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Crabs

This 10-legged animal walks sideways and is a popular seafood dish. Ask questions and find answers about their diet, habitat, and behavior here.

2,680 Questions

How do hermit crabs obtain energy?

Hermit crabs obtain energy by consuming a variety of foods in their diet, such as algae, plankton, and decaying matter. They are opportunistic feeders and scavenge for food on the ocean floor. Additionally, they may also ingest small particles of calcium for shell growth and repair.

My hermit crab has shedded it's exoskeleton but is staying in the same shell is this normal?

Hermit crabs need a shell because inside of the their shell is their soft tail or body. It needs it's shell because other hermit crabs can hurt or damage their tail or body that's inside of the shell. Hermit crabs will always be in a shell. The only time when they aren't in a shell is that quick few seconds when they change shells into a bigger one to grow. If your hermit crab is running around without it's shells there is something wrong with your crab. Go to the Mall of America (Nickaloden Universe) what ever you want to call it and ask the person why. I bet he can help you.

When does a hermit crab need a new shell?

You must always have a spare larger shell for a hermit crab as they have no natural shell of their own. Just place a larger shell in the tank and if the crab does not use it straight away, don't worry, it eventually will do as they need larger ones as they grow.

Can you put grass in a hermit crab cage?

No, it is not recommended to put live grass in a hermit crab cage as it may contain pesticides or other chemicals harmful to the crabs. Instead, you can use dried grasses or substrate options like coconut fiber or sand for their habitat.

How does a crab use its claws?

A crab uses its claws for a variety of purposes, such as catching prey, defending itself from predators, communication, and for handling food. The claws are also used for grooming and digging burrows in the sand.

Do lobsters have wings?

No, lobsters do not have wings. They are crustaceans with a hard exoskeleton and multiple pairs of legs for crawling along the ocean floor. Wings are typically found on animals like birds and insects for flying.

What is the life cycle of a porcelain crab?

A porcelain crab is not a true crab, but looks like one. They begin life as eggs, the free-swimming zooplankton. and then they develop into small crabs that live under rocks and in crevices. As they grow to adulthood they shed their skins many times, eventually becoming breeding adults that are ready to produce a new generation.

How many species of crab live on Sanibel Island?

There are only a few species of crab that live on Sanibel Island. They are they blue crab and the hermit crab. Both of those are very common species found on beaches.

What is the largest sea predator ever?

The largest sea predator ever is the megalodon, an extinct species of shark that lived approximately 23 to 3.6 million years ago. It could grow up to about 60 feet in length and had a powerful bite force capable of crushing its prey with its massive teeth.

Which one of these creatures is an echinoderm a grasshopper b spider c crab d sea star?

PENN FOSTER HAHA !

A ) Grasshopper

B) Spider

C) Crab

D) Sea Star

You are doing pennfoster too . That's so cool .

What do the crabs in the coral reef get eaten by?

Parrot fish, they don't intentionally eat it, they want the algae growing off it but they eat the coral along with the algae.

Where do some invertebrates live?

Some invertebrates live in a variety of environments such as the ocean, freshwater habitats, soil, and even on land. Examples include coral reefs for marine invertebrates, rivers and lakes for aquatic invertebrates, and forests or grasslands for terrestrial invertebrates.

When did invertebrates first appear on the Earth?

Invertebrates first appeared on Earth over 550 million years ago during the Ediacaran period. These early invertebrates were simple organisms without backbones and laid the foundation for the diverse array of invertebrate species that exist today.

Do hermit crabs live in the ocean?

Hermit Crabs live on the bottom of the ocean and eat the grasses that grow on the bottom.

What does water do to sand?

Water can make sand stick together and form structures like sandcastles. It can also erode sand particles, shaping the coastline and creating beaches. Additionally, water can absorb into the sand, providing a habitat for various plants and organisms.

What are eight consumers in the intertidal zone?

Some common consumers in the intertidal zone include periwinkle snails, sea anemones, crabs, mussels, barnacles, limpets, sea urchins, and sea stars. These animals play important roles in the ecosystem by feeding on various organisms and helping to regulate population levels.

Do crab legs contain iodine?

Yes, crab legs contain iodine. Iodine is an essential mineral for thyroid function, and seafood, including crabs, is a good dietary source of iodine.

Is a marsh crab a carnivore?

I have just checked and this is what i found out. Most crabs are omnivores but prefer to eat meat such as bivalves (clams, oyster's, etc,) because they can assimilate more nutrients from the meat. The plants are low in nitrogen, which is an important nutrient for the crabs. However, there are a few species of crabs that are strictly herbivores.

What are crab legs called?

The first pair of legs containing the chelae (claws) are called chelipeds. All five pairs are called pereopods

What kind of shells do hermit crabs live in?

It depends on the type of hermit crab. Purple Pinchers or Carribean crabs like turbo shells, but I have one in a different kind. Ecuadorians like shells with a more wide or oval shaped opening because their body is wider

How does a Dungeness crab move?

dungeness crab legs, like other species of crabs, have a unique way of moving called scuttling. They use their eight legs to move along the ocean floor, with the two front legs equipped with small claws that help them navigate and pick up food.

External parts of a crabs?

Crabs' bodies are very complex. Their main body parts consist of two claws, a head, legs, and a body. Since I never went to crab school...... I honestly have no idea. But I do think that those are the main parts of a crab. Sorry I couldn't help very much. Hope this helps!!

Do blue crabs live in salt water?

Yes, blue crabs typically live in saltwater habitats such as estuaries, bays, and coastal waters. They require saltwater for survival and are commonly found in the Atlantic Ocean and the Gulf of Mexico.

How do you collect hemolymph from crab?

There are two ways that I know of.

First, pin the roach down on its back. lift the hind lag and make a small incision in the soft tussiue that will be exposed upon lifting the leg. You should get a few drops that can be collected by pipettor. The stuff is really sticky tho, and tough to homogenize in solution.

Another method I have been experiementing with is this:

Seal the mouth and anus with super glue, or ticky wax. Take a 50 mL eppendorf tube, and place a 10 mL eppendorf within. You will have to cut the 10 ml tube to fit in the 50 ml tube, and drill holes into the bottom of the 10 ml tube. Make an incision , being very careful not to nick any internal organ, and place the roach in the 10mL tube, then the 10 ml tube into the 50 ml tube. Centrifuge at ~1000g for as long as it takes to get the required volume.

Others have also inkected saline first into the insect, to ease the clotting action of the hemolymph, but that method won't work for me, since I need undiluted hemolymph for my study.

Why do you need invertebrates?

Invertebrates play crucial roles in ecosystems as predators, prey, decomposers, pollinators, and more. Their diverse functions help maintain the balance of ecosystems and support the survival of various species, including vertebrates. Without invertebrates, many ecosystems would collapse, leading to cascading effects on biodiversity and overall ecosystem health.