Covered with long, venomous spikes, the crown-of-thorns starfish (Acanthaster planci) is a voracious feeder that can eat living corals ... Many sea sponges, like anemones, use toxins to repel ...

Comb jellies might have evolved to eat their young when prey runs out, but some experts are skeptical of the strategy Theresa Machemer The specimen may be the earliest known example of a squid ...