How does the shape of a crabs abdomen differ from that of a crayfish?
im not sure what the exact answer is but crabs aren't mammals. They are both crustaceans, class malacostraca
Crabs and Crayfishes both belong to phylum arthropoda and the same class known as Crustacea (hard exoskeletons). The only difference between them can be that crabs are a bigger version of crayfishes and they are able to live both in water and land but crayfishes are only marine.
Hope that helps
Why did my hermit crab lose a leg?
well you will have to really do nothing a crab dosent die from simple things in the wild its just a part of nature.
You can get a fiddler crab at most pet stores. I got my fiddler crab at Walmart because they were cheap. However you can also go to Petsmart I know they have them and I am sure Petco will have them too. A lot of the petstores have fiddler crabs.
Which class does a crab belong to?
There are many different types of crab. Crab belong to the Animalia Kingdom, the Anthropoda Phylum, the Crustacea Subphylum, the Malacostraca Class, the Decapoda Order, the Pleocyemata Suborder, and the Brachyura Infraorder.
In the wild hermit crabs are scavengers, so whenever they can! In captivity mine eat every night as soon as I cut the lights. Hermit crabs, like most other sea creatures, spend most of their day constantly foraging for food. They don't have set mealtimes.
Do crabs reproduce internally or externally?
both. they can reproduce sexually and asexually. sexually by male to female and then the female lays eggs which she releases into the ocean. and asexually by replacing limbs. The new leg or antennae begins to grow inside the shell of the other leg. When the crab molts you can then see the new leg. Though as someone said the first few molts it may not be at full size yet. *molting is a process of replacing the exoskeleton
What do sponge jellyfish crab have common in?
They have a lot of basic stuff in common, like being made up of cells, being able to eat, do respiration, etc. I think your worksheet is looking for the highest level of commonality, probably that they are both (surprise!) animals! (A sea sponge is not a plant. A kitchen sponge is not the same thing as a sea sponge.) A sponge is the simplest of animals, but it was motile (it could move) (*when it was a baby sponge) and it's a heterotroph
(it eats other living things).
*They also both live in the sea!
The horseshoe crab habitat is shallow coastal waters with soft sandy or muddy bottoms; occasionally they come ashore to mate. Geographically they can be found in locations including the east coast of North America, Japan, and Thailand.
What sea creatures are scavengers?
No, for the most part, sea stars are meat eating predators, many choosing to feed at night. They are able to sneak up on sleeping fish, covering their homes in the reefs, and devouring them on the spot. Sea stars can extrude their stomachs and digest their meals.
Crown of Thorns sea stars are known for eating corals, but will scavenge on dead fish when found.
What is the hard outer layer of invertebrates of a crab?
primarily for the protection of the crab, and as a defence to predators. however, if the crab has moulted recently, the new shell will be very soft, placing the crab in a highly vulnerable situation.
Birds molt to replace their old plumage. Feathers wear out and break. They are also able to freshen up for mating season. People renew their skin all the time, but the structure of feathers means they have to drop out and regrow.
A crab is not an insect. It is classed as a Crustacean. Crabs are more closely related to arachnids (spiders, scorpions, etc.),than to insects, being that they have four pair of legs, rather than three and only two main body sections (insects have three).
Are lobsters and crabs actual insects?
Crabs and lobsters are arthropods. In colloquial speech the term "bug" generally refers to arthropods on land, mostly insects and arachnids.
In scientific terms the only true bugs are insects in the order hemiptera, excluding crustaceans, which are not insects.
What body covering is on a crab?
A crab has three main parts on its body: * carapace - the main part of the body consisting of a hard shell * thorax - consisting of its head and the middle part of the body * cephalothorax - that part which joins the head and the middle section together. Other main crab body parts are leg parts unique to crabs - the front two legs of the crab, nearest the head, are called chelipeds and are sometimes used for walking but mostly for eating. The claw on the cheliped is called chela, and these are used to grasp or hold something. If a crab loses its claw, a new one will grow.
They are crabs. They are known as ghost crabs because some have transparent bodies, while others, like the Atlantic ghost crab are yellowish. They can scuttle around at about 10 mph, thus making them run away so fast it seems as if they disappear like a ghost.
once in a wile they shed maybe every4 months they always need bigger shells they live up to 2 and a half years or more if it is a healthy crab you should clean there tank/cage or whatever it is in and every couple days so keep your crab healthy
Why do fiddler crabs have exoskeleton?
The hermit crabs first pair of legs are their claws which they use for drinking, eating, and defense. The second, third, and fourth pair are for walking. The fith - tenth are for holding it's abomen inside it's shell.
Do crabs live alone or in groups?
They live in groups; they are very social animals and in the wild can travel in groups of 100 or more.
How many years can a hermit crab live for alone in captivity?
By itself maybe 1 year. But with friends they can live up to 15 years but there was one woman who raised her hermit crabs for over 30 years
yes,crabs do have heads.you cant see there heads,but yes they do have heads
Do horseshoe crabs have poison?
Horseshoe crabs are NOT poisonous at all and are harmless. During mating season, the eggs are extremely poisonous and should not be touched or eaten, you will be poisoned and you may die if not treated.
Why do hermat crabs like to be with other crabs?
Hermit crabs like to be with others, like how other animals like to be. It always nice to have another partner. I had several hermit crabs and they lasted longer than ones with out any other hermit crab.
How long can you keep frozen crabs in your freezer?
Commercially prepared and never unfrozen , about two months. But crab loses flavor quickly, and I would use them before their expiration date, even if kept properly frozen.
Homemade and then frozen, not more than aweek for best flavor, and after two weeks, it's cat food.