Pleurobrachia bacheiexternal image images?q=tbn:ANd9GcTp4SyCNZ8e83NLTi4o9WZnJ5I840wdpLTgr18-5dOP8D5anxnjzwP. bachei are colorless ctenophores that are usually found near the surface of waters in temperate seas, ranging from Alaska to Mexico. Their globular bodies are 99% water. Unlike other ctenophores, they lack the photoproteins neccessary for bioluminescence, although their cilia may reflect light and produce a similar effect. Breeding can occur at any stage of life, and around 1000 eggs are laid per day. Their usual prey includes copepods, larval fish, various eggs, and small crustaceans. TheP. bachei's regulation of the copepod population is especially important to the preservation of the ecosystems they regulate, because otherwise, the copepods would eliminate the phytoplankton.NextBack home