Marine Worm, Magelonid polychaete, Bristle worm larva, Bristle Worm larva, Magelonid polychaete, ID by Leslie Harris, Marine worm, The body is the shorter part, the two long bits are the feeding tentacles, Larvae are pelagic, adults are found in soft sediments., Black Water Diving; Gulf Stream Current; Plankton; SE Florida Atlantic Ocean; pelagic larval marine life; plankton creatures