pipefish

Any of various long-snouted, thin, pipelike marine fishes in the same family (Syngnathidae) as seahorses. The great pipefish Syngnathus acus grows up to 50 cm/1.6 ft. The male has a brood pouch for eggs and developing young, in which he carries the eggs from three to four different females. The eggs hatch in five to six weeks as tiny versions of the adults; there is no larval stage.