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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

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.

8 oz is how many pounds?

8 oz. is half a pound. one pound is 16 oz.
One pound is sixteen ounces, so there is one-half pound in eight ounces.
0.5 lb. One pound equals to 16 ounces and one ounce equals 0.06 of a pound. Also this relates only to solid (weight) ounces. There are two different kinds of ounces, ounces of weight/mass and ounces of volume (fluid). This can change when you are using the ounces to measure a non-liquid such as flour or sugar since the weight of dry items is not the same as their volume. An ounce of volume is called a "fluid ounce."

How many carbohydrates in crab legs?

Most real and pure crab meat is truly zero carb food. Beware of artificial crabmeat, however, as sugar is used to make it taste like crab meat. It also seems that dungeonous/dungeness crab has some carb count so a low-carber will want to avoid that in any large amount and avoid the artificial crabmeat completely. http://www.carb-counter.org/fish/search/%20crab/1500

http://www.carb-counter.net/fish-shelfish

What is the scientific name for blue crab?

Crabs are decapod crustaceans of the infraorder Brachyura. For a more specific name you need to specify which type of crab

Lobsters crab and shrimp all belong to what group of animals?

Lobsters, crab and shrimp all belong to the phylum Arthropoda and the Subphylum Crustacea.

What is the biggest striped bass ever caught?

A new all tackle record is being certified now, caught in Connetticut, 81 plus pounds.

However, a 125 pound fish was caught in a commericial net in the 1890's in North Carolina, off Cape Hatteras.

What would happen to Chesapeake Bay if the amount of blue crab were to increase in the ecosystem?

Well first of all, the prey of the blue crab would decrease in population and the predators would increase in population. As a result the whole food chain would be thrown off. organisms which have the same diet, live in the same territory as the blue crab would also be affected because an increase in the blue crab population would mean a decrease in the natural resources that those blue crab exploit. if the blue crabs were able to keep a steady or exponential population growth, barring the natural resources around them lend way for population growth the blue crabs would eventually hit their carrying capicty. One they reach and begin going beyond this capacity the Blue Crabs would have to outcompete their selves for dwindling natural resources, mates, food, etc. Eventually the population would decrease because of this interspecies competeion as a result overexplotiation of natural resources. Things could in the entire ecosystem could return close to normal considering the no other species went extinct as a result of Blue crab population growth or no enviromental changes occured a sa result of this growth.

Why do fiddler crabs dig burrows?

Fiddler crabs dig burrows to create a safe shelter from predators and to regulate their body temperature. Burrowing also helps them stay hydrated by preserving moisture in the burrow. Additionally, male fiddler crabs use their burrows to attract mates and establish dominance within their territory.

What is the smallest crab in the world?

Pea crabs in the family Pinnotheridae are about .25 inches across the shell

What is the respiration system of a prawn?

Praws have gills (special gas exchange surfaces) at the base of each walking leg. In order to pass a constant supply of oxygenated water over the gas exchange surface the gills are ventilated by movement of the walking and swimming legs. A prawn has 5 pairs of walking legs (located on thorax) and 5 pairs of swimming legs (located on the abdomen)

What do sally light foot crab babies eat?

Sally lightfoot crab babies primarily feed on algae, plankton, and small invertebrates in their natural habitat. Their diet may also include detritus and other organic matter found in the water to help them grow and develop. Additionally, they may scavenge on decaying matter or consume small crustaceans and other tiny creatures in the surrounding environment.

How fast can a crab move mph?

Crabs can move at varying speeds depending on the species, but they generally range from 1 to 3 miles per hour. Some crabs, like the ghost crab, can run much faster, reaching speeds of up to 10 miles per hour.

What are some types of coats?

  • Trench coat
  • Rain coat
  • Suit coat
  • Winter coat
  • Ski jacket
  • Leather coat
  • Coat of paint/varnish/stain/lacquer

When is hermit crab season?

Hermit crabs do not have a designated season in the wild; they are typically available year-round. However, the availability of hermit crabs in pet stores may vary depending on breeding cycles and demand. It's best to check with your local pet store for more specific information on when hermit crabs are available.

Symbiosis of a crab spider of a flower?

The crab spider relies on flowers for camouflage and ambushing prey, while the flower benefits from the spider's presence as it helps protect the plant from herbivores. This mutualistic relationship is an example of symbiosis, where both species benefit from their interactions.

Do hermit crabs drink fresh water?

The kind of hermit crabs most people think of are Land Hermit Crabs. They live on land, and need at least enough water to submerge themselves. Land Hermit Crabs do need sea salt to keep their body chemistry balanced, and as such, need access to both salt and fresh water.

Marine Hermit Crabs require a full saltwater aquarium to survive. Such tanks are elaborate, and should be researched thoroughly before purchase. Saltwater pets of all sorts are often regarded as difficult to care for.

How do crabs drink water?

Crabs absorb water through their gills from their environment, whether it's saltwater or freshwater. They may also moisten their gills to facilitate gas exchange and remove waste products while regulating their internal salt and water levels.

Do hermit crabs drink salt water?

Hermit crabs require both fresh and salt water to thrive. They drink fresh water to stay hydrated and occasionally dip into salt water to replenish minerals and salts. It's important for their overall health and ability to moult properly.

Does a hermit crab live in the same shell?

No they dont. they change shells once they are uncomfortable with their shells and theyre getting bigger . their shells are like clothes we wear. if it gets smaller we find a more larger one :)

How do hermit crabs go to the bathroom?

when they go, they gotta GO! they dont use a litterbox or anything, they just go! Sometimes when my hermit crab is nervous he pees! I think its hilarious! P.S the poop doesnt smell!

Can hermit crabs live without heat?

A hermit crab can go with out others but I is highly recommended. Hermit crabs are social animals and like to live together. They get lonely. In the wild hermit crabs live in colonies or clans.

It can survive but hermit crabs are colony species, living in groups of hundreds of crabs. They do best with other crabs nearby. I suggest having a minimum of two or three. They can get very lonely.

You can have one hermit crab though. But as the person above said, they can get lonely.

User:Gab33

Not really. For some months yes but if they go a long period of time without any other hermit crab contact they won't be doing so well. If they get lonely then its really not good for them. You really need another hermit crab.

What are the natural predators of land hermit crabs?

Natural predators of land hermit crabs include birds, reptiles, and some mammals like raccoons and crabs. These predators typically prey on hermit crabs by sniffing them out, knocking them over, and breaking their shells to access the soft body inside.