At the Monterey Bay Aquarium Research Institute, for example, marine biologist Steven Haddock recently discovered that certain jellyfish can not manufacture their own luciferin and that they probably get it from eating small crustaceans. (discovermagazine.com)
The killer shrimp is not as bad as its reputation: Researchers at the Technical University of Munich (TUM) have discovered that the amphipod crustacean, which is native to the Ponto - Caspian region, is not a true predator and only plays an indirect role in the massive species extinction of small crustaceans in native waters. (sciencedaily.com)
Some spiders, midges and small crustaceans called amphipods also cannibalize their mates. (sciencenews.org)