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Sea Crabs (Liocarcinus vernalis), are animals that mainly live in the sea. It belongs to a class of Crustracea. These are ten-legged creatures and more than 5000 diverse kinds of sea crabs exist. Most of the crabs exist in seas and oceans, but there are some, which exist on the land. Sea crabs have a wide range of varieties right from the minute larval crabs to vast sea crabs.
The body of a crab consists of a head, thorax and abdomen. There is a hard shell over their back known as carapace. They have five pair of legs. Each of the two front legs has a pincer.
Habitat and Behavior of Sea Crabs
The sea crabs are mainly invertebrates with an exoskeleton and has a shell that protects them from enemies. They have ten legs, two antennae, two eyes and compressed stiff. The main difference between sea and land crab is that, the sea crab has gills to respire under water while land crab has lungs to breathe in air. The crabs are mostly found to be omnivores. They can eat anything whether it is plant or animal. They catch their prey with the help of their pincers.
The sea crabs mate mostly in salt water. The females can carry more than a million eggs in her belly. The egg hatches and the tiny larva come out. Later, they undergo several changes and change their shape several times.
Some examples of Sea Crabs
- Red Sea Crab
They are red colored sea crabs found mainly in the Gulf of Marine, Gulf of Mexico and the Northwest Atlantic Ocean. They live in pits underneath from 200 to 2000 meters.
- Japanese Spider Crab
It is the biggest crab and is found around Pacific Ocean. They grow up to a size of 12 feet in leg span.
- Coconut Crab
They are found around Pacific Ocean and grow up to a size of 2.5 feet in leg span.
- Hermit Crab
These crabs belong to the Paguroida family and have a shape different from other crabs. They enter and stay inside an empty shell in order to protect themselves from predat.
- Blue Crab
Its scientific name, Calinectes sapidus, means "beautiful swimmer," and it is undeniably a beautiful blue- green color crab. They vary in size from 3-1/2 inches up to 6-1/2 inches.
- Horseshoe Crab
Its scientific name is Limulus polyphemus, this crab is named for its similarity in shape to a horseshoe. It is considered as an existing fossil, tracing its roots back some 600 million years. And yes, they are indeed fit for human consumption, although the fraction of meat to shell is small.
- King Crab
Its scientific name is Paralithodes camtschaticus, this gigantic crab is also often called as "Alaskan King crab," "Japanese crab," and "Russian crab" due to its dimension. It may be huge.
Types of Hermit crabs
While scientifically, there are quite a few species of hermit crabs, but there are two major types of hermit crabs that is the land and the Ocean hermit crabs.
- The land Hermit crabs
The land hermit crabs also known as tree crab is the more accepted of the types of hermit crabs because they are easier to find. The land hermit crabs are normally the hunter type.
Types of Ocean Crabs or Ocean Hermit crabs :
- Sand Crabs
Sand crabs are very small and exist at water's rim. They make a tunnel into the sand with their faces on the way to the sea and nourish themselves as waves wash over them.
- Common Shore Crab
The common shore crab is a well-known species all over the world. This is the crab most people relate with beaches.
About Alaskan crab
King Crab used to be the golden baby of the crabbing fishery in Alaska. While the quantity of king crab harvested and purchased is barely where it used to be. Different varieties of king crab yield high prices.
Types of Alaskan crabs
- Tanner CrabThere are two variety of tanner crab; the bairdi and opilio tanner crabs. When the king crab fishery took a dive throughout the 70s, the tanner crab production became the area of spotlight for under pressure king crab fisherman.
- Dungeness crab
Dungeness crab isn't as economically appealing as some of the other crab species. It is though, a brilliant way to gain industry experience. Dungeness crab is also found in low waters and river mouths.