Many animals eat their parents, siblings, and offspring for different reasons. The more scientists learn about cannibalism in animals, the more they discover it’s a vital part of nature
and professor emeritus of biology at Long Island University. It’s most often observed in invertebrates and fish, he says, but cannibalism occurs in every major animal group.
This form of cannibalism can also happen much earlier, when the offspring are still eggs. Egg cannibalism can be easy, nourishing, and requires little effort. Female cichlid fish from Central Africa, called Burton’s mouthbrooders, carry their eggs in their mouths. Surprisingly, a recent study showed these mothers sometimesIn other species, males will kill infants unrelated to them, an act known as infanticide. In these instances, such as with themales kill and eat pups who aren’t theirs or whose paternity is uncertain. Doing so puts the female back into estrus and ready to mate again quickly.
In her final act of motherhood, a velvet spider will dissolve her own organs and vomit them up for her offspring to eat before they eventually consume her entire body.
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