they eat stuff
The main enemies of the Japanese Spider Crab are octopuses, large fish, and occasionally humans who catch them for food. These crabs have a hard exoskeleton which provides protection against predators, but they are still vulnerable during molting when their shells are soft.
I would say a spider crab needs as much as 8 pound of food
food
By a special egg
The Japanese spider crab is a popular food item that is becoming harder to find. For this reason, it is thought that the species may become endangered, but it currently isnâ??t.
digs into it with claws
Males are larger than the females. Behavior: In spite of its ferocious appearance, it has a gentle, calm disposition. Unable to swim, they spend much of their time crawling on the sea bed, foraging for food. Diet: Japanese spider crabs are omnivorous and scavenge for food.
A big white spider with brown, reddish legs might be a crab spider. Crab spiders like to live in outdoor areas where there is plenty of food for them, like in a garden.
Spider crabs are omnivores, meaning they consume both plant and animal matter. Their diet typically consists of algae, small fish, mollusks, and other crustaceans. They are known to scavenge for food on the ocean floor using their specialized feeding appendages.
Japanese spider crabs are often found near the southern coast of the Japan island, Honshu. But they are also known to live in the Atlantic and Pacific waters where they feed off of food particles, small fish, plants and mollusks
The crab will eat bits of uneaten food (pellets/flakes etc on the bottom of the tank. It will also clean up any dead fish etc that it finds.
A house spider finds its food by searching for crumbs or anything edible left behind. It is nearly impossible to keep them away without providing some type of permanent solution, such as an exterminator.