What's the difference between i.e. and e.g.?
either of two cosmopolitan genera of invertebrate marine animals in the phylum Ctenophora: the Hormiphora and the Pleurobrachia. The genera, widely distributed in all the oceans, are represented by 90 species. Sea gooseberries are wholly planktonic in their life cycle, lacking any sessile (attached) stages. They feed on other small planktonic animals such as arrow worms. Their bluish-white luminescence sometimes colours the waves at night. They constitute an important part of the diet of the European herring.