Sea Ghosts in the Seas Jellyfish Threat to Fisheries
A feature on jellyfish or sea ghosts, their biology and impact on fish stocks. The United States Bureau of Fisheries notes jellyfish breed in bays and estuaries in spring and summer and drift seaward as they devastate young and eggs of valuable fish like mackerel and bluefish. Giant jellyfish, sea marbles, and sea nettles are described with vivid detail of size, venom, and dangers to swimmers.