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Crustaceans

Zoologists classify lobsters, crabs,

shrimps, and their relatives as arthropods.

An arthropod (which is from

the Greek arthron, joint; pous, foot) is an

invertebrate animal, one without a

backbone, having jointed appendages.

Other arthropods or joint footed animals are insects,

spiders, mites, scorpions, centipedes, millipedes,

and the last two being the one hundred legged and

thousand legged animals with which

many of us are familiar, although neither

has a hundred nor a thousand legs.

Nearly a glance at any of these animals will

show that in respect to their appendages

they are structurally alike though

they may differ in other ways.

It will be noted that the lobster belongs

to the class Crustacean. So, too, the

crabs, shrimps, and all their relatives

such as the barnacle, Cray fishes, fairy

shrimps, and Beach fleas. Most members

of the class Crustacean are small

animals under half-inch in length.

The lobsters and the crabs are the Giants.

DECAPODS CRUSTACEANS

Kingdom: Animalia

This page is dedicated to general information on

many different marine organisms! If you love marine

life as much as I do, I'm sure you'll enjoy learning

some interesting facts about them.

Hope you like the page!

Hermit Crabs & Cleaner Shrimp

Coral and Sponges

Famous for their constant house hunting,

Hermit Crabs are one of the most

popular invertebrates to own.

Found all over the world, they occupy the

discarded shells of other species.

As they grow, they require larger and larger

shells, which they use as armor and

a hiding place from their enemies. In

addition, they are, surprisingly, varied in

color, including brown, red, and blue.

Red Hermit Crab

(Dardanus Megistos)

The hermit crab is a curious species that carries

its home around on its back. Because the crab's

abdomen is soft and vulnerable, its uses discarded

snail shells to protect itself. As the crab grows larger,

it must continually seek out larger shells. Hermit

crabs are adept scavengers, and will feed

on just about anything they find.

Scientific name: Dardanus sp.

Although interesting to observe and useful as scavengers, larger hermit crabs are too destructive to be kept in a community aquarium. Some of the smaller varieties are not as great a threat to tankmates. Hermit crabs spend most of their time foraging and are often more active at night. (Source: Scott Michael, author of Reef Fishes, Microcosm Press)

Degree of difficulty: relatively easy

Maximum size: 1.5 to 6 inches long, depending on the species

Compatibility: More than one hermit crab can be kept in the same aquarium, but larger individuals may prey on smaller ones. Larger hermit crabs are very destructive, feeding on other invertebrates and small sleeping fish. Smaller specimens should not be kept with crustacean-feeding fish, such as groupers, snappers, or hawkfish. All are potential prey for larger wrasses, triggerfish, pufferfish, and porcupinefish.

Food: omnivorous; its diet should be varied and include plant material

Habitat: These crabs can live on sand or hard bottoms. Provide them with extra shells to move into as they grow.

The Saltwater Crab

The word crustacean

comes from the Latin crusta or shell and was originally

used to designate and animal having the hard but flexible

covering or shell as contrasted with an animal,

such as the oyster or clam having a hard but brittle

covering or shell. But since nearly

all arthropods have a hard, flexible covering

it has become necessary to use more

distinctive criteria for designating and

animal as a crustacean. The Decapods borrow , the largest and

most highly organized of crustaceans,

we know them as lobsters, crabs, shrimp,

and crayfishes.

The Phyllopods are crustaceans with flat,

leaf like thoracic appendages that

serve no double purpose of respiration

and swimming, these include many

shrimp such as the brine shrimp

 Pictures

and

Crustacean List

By Species Name

All of the species described and pictured are listed .

To go directly to a particular species in this

list click on the name. If you prefer to look at

the image gallery of a group click on a heading.

Scarlet Cleaner Shrimp

The Shrimp

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Caring for Tridacna Clams

The clam should be placed on a flat, horizontal, clean surface. The byssus opening should be flush against the substrate. Do not place the clam between two large rocks or in a small hole, or it will not be able to open up all the way. Tridacna clams like gentle, indirect water currents. They should also be places far away from aggressive corals and anemones.

H.hippopus, T.maxima, T.crocea, and T.derasa photo's courtesy of

                          For Lobsters

What to expect from Redclaw while in fish tanks. Redclaw are a very colorful, and make a nice addition to any fish tank. Redclaw can be a tan color, with pastel markings on the side of the body ,or a dark blue black color that has golden band . In both cases male Redclaw will display the sky blue claws, and bright red patches on the outside of their claws. Redclaw are omnivorous, and will take advantage of any food source. Any food source can include your plants, small slower moving fish, and each other. Most of this can be overcome by having enough food for Redclaw to eat, and a good place to hide.

Lobsters include large crustaceans from two groups, one with a pair of large claws and the other without. Clawed lobsters, yabbies and freshwater crayfish, live only in rivers and lakes in Australia but in the northern hemisphere there are marine representatives too. Marine lobsters, some of which are also called crayfish in Australia, do not have claws and are the ones figured here. The carapace is calcareous and tough, reinforced to protect the internal organs of the head and thorax and the gills at the bases of the legs. The antennae are obvious, the compound eyes are on mobile stalks, there are six pairs of small limbs around the mouth, and five pairs of walking legs. The abdomen is strong and muscular, with a strong segmented exoskeleton on the back. It has the swimmerets underneath and ends in a tail fan.

Starfish

The Starfish

Although they can easily be housed

with most fish, Starfish will prey on

mollusks or sea urchins, which

comprise their primary diet in the wild.

They do not require a special

temperature or salinity and will thrive at the

standard aquarium temperature

of  77 degrees Fahrenheit

and salinity of 1.020.  Because they tend to be large in size,

Starfish should be housed in big tanks.

They need a diet of frozen shrimp,

mollusks, fish, and detritus.

 Clams     

Tridacna maxima

Maxima and Crocea clams are the

most popular for the home aquarium.

They have the richest colors and the

most vivid patterns and are stunningly

beautiful, especially when viewed from

above. They are further characterized

by the rows of fluting along the sides

of their shell. Despite their delicate

appearance, they are easily maintained

if you have the patience and the desire..    

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Clams HERE

Bivalves for the Reef Aquarium

More Invertebrates

Momentum Media Website Momentum Media Website Momentum Media Website

 

The Seahorse

Proper nutrition is the key to keeping seahorses

healthy and breeding them in captivity. In their

natural habitat, seahorses feed continuously

throughout the daylight hours, consuming great

numbers of small crustaceans and other larval

organisms that are collectively termed

zooplankton

FROZEN FOODS FOR ADULTS

Feeding your seahorses by hand permits the aquarist to conduct a close-up, daily

inspection of every specimen in his tank.

A seahorse is a type of fish closely related to pipefishes and belonging to the scientific family Syngnathidae. About 35 species of seahorses occur worldwide. The seahorse's scientific genus name Hippocampus is a Greek word meaning "bent horse." Depending on the species, seahorses reach lengths from about 5 to 36 cm (2-14 in.).

The Sea Anemone

Click here to learn about the Anemone

          The sea anemone is a primitive marine invertebrate

        (phylum Cnidaria, class Anthosoa) with a jelly-like body,

        a blind stomach and tentacles which are used to catch prey.

          The animal lives on rocky ocean floors and usually

            in intertidal zones.

                              

The Brighter Side

Of

SEA SLUGS

What are Sea-Slugs?

Despite their rather ugly name, sea-slugs include some of the most beautifully coloured and delicately shaped animals in the sea. They are related to marine snails, and during their evolution their shell has gradually become smaller and eventually lost. The 'slug-shape' has evolved many times amongst both land snails and marine snails.

FOR ANIMALS that are toxic, bright coloration can send a vivid message: Attack me at your peril. So it is for many sea slugs, also called nudibranchs. Of the 5,000 of these often-dazzling mollusk species, most are found in the Indo-Pacific region. Long ago, perhaps to increase mobility, they shed their awkward, protective shells, frequently relying instead on gaudy hues to avert attacks. For enemies that fail to take heed, an arsenal of chemical secretions and other noxious surprises awaits.

THE SLUG SITE

Pan American Nudibranchs

The Slug Site

Philippine/Indo-Pacific Opisthobranchs

The Slug Site

Indonesian Sea Apple

Pseudocolochirus axiologus

Nudibranches

Nudibranchs from the Mediterranean Sea

Sea slugs secrete a seductive scent that makes them almost irresistible to each other and researchers believe that one day this chemical could be used to control the reproductive cycles of important food-source animals.

OPISTHOBRANCHS

CLICK HERE to

Beautiful underwater Photography

Molluscs

In total, there are eight classes of molluscs. There are the three major and very familiar groups: 1) clams and mussels (Bivalvia), 2) snails and slugs (Gastropoda) and 3) squids and octopuses (Cephalopoda). Then there are the less familiar chitons (Polyplacophora), and four groups of which relatively few people will have heard anything about: 1) Scaphopoda, 2) Monoplacophora, 3) Aplacophora, and 4) Caudofoveata (and the relationships of this last group are still the subject of some debate). I’ll spend the majority of the these articles discussing the ecology and biology of molluscs (primarily the first 3 groups listed above) in some detail, and then I’ll try to discuss some of the specifics of the animals themselves.

LIVE SAND

and Invertebrates,snails

For Reef Aquariums

Live Sand and Invertebretes

For the Reef Aquarium

LIVE ROCK

In a closed aquaria system, live rock is

by far the healthiest and most beneficial

means of  biological filtration.  As it

resembles nature more closely, it  is

healthier for your fish and livestock

as well.  It also acts as a home for reef

 coral and other invertebrates .

Live Rock

The fascinating sea-horse belong

to the same family as pipefishes and sea

    dragons and are believed to have evolved

over 40 million years ago. Sea-horses

exhibit seemingly bizarre reproductive

behavior. When they reproduce, the

male becomes pregnant-carrying

the fertilized eggs in a brood pouch and

    nourishing the young until they are born. Sea-horses

practice faithful monogamy, mating exclusively with the

same partner during their lifetime. They perform

greeting dances every morning to confirm

their bond and are slow to find a new

mate if their partner disappears or dies. Unfortunately,

the sea-horse's unusual reproductive behavior makes

them very vulnerable to over fishing. Sea-horses

have low reproductive rates and their

populations are easily disrupted.

 

The Featherduster

The Bristle Worms..Reef Pest

The Blenny and the Goby

More about Anemones

The Sea Anemone

In an aquarium, without an actinian,

captive fish will bathe among air bubbles

or frondose vegetation, so we infer

that they obtain tactile stimulation from

anemone tentacles. And the claim

of some aquarists that the fish are livelier

and healthier when kept with anemones

suggests other benefits as well.

Indeed, aquarists have added much to

knowledge of this symbiosis. Many have

seen fish bring food to their anemones.

This behaviour seems confined to

aquaria. The normal diet of clownfishes

is small plants and animals that live in

the water above the anemone, or algae

that grow around it .  In nature, they do

not encounter large particles of food,

so they eat their food where it is found.

Feeding large morsels to a fish in an

aquarium produces an artifact: the fish,

unable to devour the piece immediately,

takes it home to work on it in the

relative security of its own territory,

as is typical of predators that obtain food

in large amounts. But the territory

in this case consumes the food!

    Benefits or detriments to the anemone

are not obvious. But neither do the fishes

seem to harm their hosts. Therefore,

many biologists have considered this

a strictly one-sided relationship.

The occasional anemones found in nature

lacking fish support this conclusion

-- they seem to survive perfectly well

without fish.

Or do they? Read the article,

you will find it very interesting.

Anemones are often described as a sack of water. Although this analogy is over simplistic, the majority of an anemone's mass is water. Anemones have the ability to inflate and deflate, changing sizes very quickly by drawing water in through the mouth, which is a slit-like opening on the oral disc. The mouth is surrounded by a ring of tentacles. The majority of the body consists of the column. At the base of the anemone is the pedal disc, which the anemone uses to attach itself to substrate or rock.

The Arrow Crab looks like a daddy long legs spider. It is not afraid even when

divers approach it. The Arrow crab is very

good at getting rid of Bristol worms,

a scourge in some aquariums. This crab

has long pointed pinchers, and can

reach into small areas to get the

Bristol worms. You must be careful, this crab

will eat any vegetable form that is in

the aquarium. They will prowl the

aquarium looking for any

small crustacean to eat also.

Gorgonian Corals

& Sponges

FOR REEF AQUARIUMS

Coral and Sponges

Coral

Cephalopods

  PROPAGATION OF

COMBINATION LIVE ROCKS

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Coral

Propagating Corals

SOFT CORALS

The Sponge

Sponges are highly variable in color, ranging from white to black, with many brilliant shades of red, orange, yellow and even blue in between. The pigments responsible for the color of the sponges appear to be derived from a number of sources, including de novo synthesis, translocation of pigments from food particles and symbiotic bacteria and/or algae.

Though plant-like in appearance, sponges are actually one of the most primitive animals in the sea. They belong to a group called porifera. Most of us are familiar with the dried colorless varieties that populate the kitchens and bathrooms of the world. But in the ocean, live sponges can be found in an infinite variety of colors and shapes. Most of them are relatively small, but some varieties can grow to over 6 feet in diameter. Sponges differ from all other marine invertebrates in that they have no true tissues or organs. Their structure is composed of simple aggregations of cells. The name porifera means pore bearer. The tissue of sponges encloses a vast network of chambers and canals that connect to the open pores on their surface. Sponges feed by drawing a current of water in through their pores, filtering out the nutrients, and then ejecting it out through an opening. Many sponges on the reef resemble some of the corals in shape and color, but upon closer inspection the difference is apparent. They are one of the many life forms unique to the ocean environment. Sea squirts are very similar to sponges in appearance. They belong to a group called chordata. They are usually found growing in clusters on rocks. Like sponges, they filter particles of food from the water by pumping it through tiny pores and then expelling it through a central opening. Below is a listing of some common reef sponges & sea squirts.

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Saltwater Aquarium Guide

With the outstanding assortment of beautiful saltwater fish to choose from, it is no wonder that so many hobbyists dream of maintaining a marine aquarium. This guide is intended to answer many of the questions a novice marine aquarist may have, and to provide some basic guidelines for selecting and caring for saltwater fish and invertebrates. In addition, we hope that every saltwater hobbyist will read several good, current books on the subject.

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  Many Examples of reef fish
 •Reef Fish, The Gems of The Sea

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OCTOPUS

Phylum: Mollusca
Class: Cephalopoda(head-foot)

CLICK HERE

Octopuses, squids, cuttlefish and the

chambered nautilus belong to class

Cephalopoda, which means 'head foot'.

Cephalopods are mollusks and therefore

are related to bivalves (scallops, oysters,

clams), gastropods (snails and slugs),

scaphopoda (tusk shells), and polypla-

cophorans (chitons). Some of these mollusks,

like the bivalves, don't even have a head,

much less something large enough to be called

a brain! Yet cephalopods have well developed

senses and large brains and are thought to be

the most intelligent of all invertebrates. Most

mollusks are protected by a shell and many of

them are not very mobile. Although the ancient

nautilus has an external shell, the trend in

cephalopods is to internalize and reduce the shell.

The shell in cuttlefish, when present, is internal.

The cuttlebone from cuttlefish is sold in many pet

shops to supply calcium to birds. Squid also have

a reduced internal shell called a pen. Octopuses

lack a shell all together.

The Nautilus

The Chambered Nautilus normally resides

in about 600 feet of water. This relative

of the Octopus has remained virtually

unchanged since ancient times.

Above it's tube like jet, is a beaked mouth.

Very much like an octopus, and also

used to crack open shells. Surrounding

all of this are many tentacles which

can be extended out or tuck in close

to the body. These tentacles are also

very sticky enabling the nautilus to pull

food close to its mouth making it easier

to use that sharp beak to drill into or crack

shells and small crabs. The entire

living body is located in the first several

inches of the shell opening. For

protection, the very tough flexible

covering can be drawn in, covering

the entire soft body including the eyes and

tentacles.

The chambered nautilus, along with squids,

octopi, cuttlefish is a member of the class

Cephalopoda of the phylum Mollusca. One of

the most striking characteristics of members

of this group is the well-developed sensory and

nervous system. The pearly nautiluses are

partially, at least, scavengers that can hold an

occasional windfall of up to 20% of the body

weight in their large crop.

A New Page with updates on ......
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Marine Invertebrates

Reef Tank

Marine Reef tank

The Reef, Another World

Invertebrates

Setting up the reef tank by Joe

Products for reef tanks

Step By Step of setting up a reef aquarium

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Member of Andre's Aquarium Club.

If you have any aquarium

related questions check out

the Aquarium Doctor.

The Aquarium Doctor

Example

Question........I have purchased what was

called a long tentacle anemone.

This specimen has a base about

1 1/2 inches around and about 2 inches high

with many long (2 to 3 in)

translucent tentacles on it .

When I placed it into the tank

I first placed it near the top of my tank, after

a few hours it started to move

down between the rocks until it was almost

hidden, so I moved it to a spot lower

in the tank and again it did the same

thing. This happened a third time ending

up with the base of the anemone buried

in the sand so I moved it into an open

area of the sand where it is now and

again the base is buried in the sand.

Would this be a normal position for

this type of anemone? if not why does

it want to bury it base? I also would

like to know what is the best food to

give it?

Thanks, Don Taylor

Answer.........Don!!!!!, the best recommendation

I can give you is to let the

anenome go where it wants to.

By moving the anenome you may damage his

fragile body. Also the anenome

has a natural instinct on where to locate

himself for optimum protection and

filter feeding. Kent Marine makes a good

anenome nutrition formula. I have

constructed a pipette that I inject the food

directly at the anenome. This can

be made by attaching a flexible air tube to

the end of a small rigid air tube.

Then squirt a little of the food in the end of

the rigid tubing and blow lightly

into the flexible tubing shooting the food

into the mouth of the anenome.

I hope your anenome does well. Let me know

if you have further questions.

"The Aquarium Doctor"

go to The Aqua Net,

Received from the diver himself

Member, Dale Barger

Gulfview Marine

    Live Rock ,

   We have four classes

of Live Rock...

  Gorgonians & Sponges,

   based on availability...

 Gulf Sand ,

Taken next

to natural reefs...

Inverts,

Crabs & Snails, etc..

Gulfview Wholesale Marine specializes in Aquaculture, Live Rock, Gulf Sand, Gargonian, Coral, Sponges, Snails, and Crabs. Since 1988, Gulfview has been a live rock harvester and established a solid reputation for the quality to which they are committed. We strive for quality... not quantity.

Gulfview is one of the few aquaculturalists permitted by the government to harvest rock specifically grown for the marine aquarium in the Gulf of Mexico.

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