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What do crabs. Eat?

Updated: 11/7/2022
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Wiki User

8y ago

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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

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Jesus Garcia Lopez

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Crabs are omnivores, feeding primarily on algae, and taking any other food, including molluscs, worms, other crustaceans, fungi, bacteria, and detritus, depending on their availability and the crab species. For many crabs, a mixed diet of plant and animal matter results in the fastest growth and greatest fitness.

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11y ago

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