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Crabs are 'carrion eaters', meaning they feast on what's left after a larger predator has its fill. Typically, they munch on pieces of dead fish or whatever else happens to wind up on the bay or ocean bottom, since that is where they live.

  • They are detrivores. They will consume animal as well as plant matter (algae, etc.). They will mostly live off plankton and other types of water plantation. They also eat some small fish in the wild, along with crayfish, barnacles, mussels, prawns and shrimp.
  • Crabs are opportunists. They will eat what they find, including partially decomposed items.
  • They also eat hatchling turtles.
  • Some species have been known to eat guano (bat droppings).

Different species of crabs eat different foods. Depending on the species, they may eat plankton, worms, shrimps, prawns and other shellfish, and they scavenge for animal and/or plant remains.


Crabs are opportunistic scavengers and will consume nearly edible thing they can grasp. Most crabs will readily small shrimp, including shrimp pellets, frozen mysis, etc. They will also eat dead fish and other animals.
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Sister Little

Lvl 13
3y ago

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