Syngnathoides biaculeatus, the Alligator Pipefish, is a member of the family Syngnathidae, which also includes the seahorses and sea dragons. Alligator Pipefish are found in shallow coastal waters, living among algae, seagrasses, and weeds. They eat small microinvertebrates, such as zooplankton, using their pipe-shaped mouth (hence the name pipefish). Alligator pipefish have been reported to achieve a maximum length of 260 to 300 mm. (Barrows et al. 2008 and references therein)
Alligator Pipefish are ovoviparous, meaning that eggs grow and develop within the mother, though there is no nutritional connection between the parent and egg. As is the case for the males of all pipefishes and seahorses, male Alligator Pipefish take major responsibility in the protection of the eggs before they hatch. Eggs reside in brood pouches of the males until they have fully developed and hatch as juveniles. The size of the brood is directly correlated to the size of the male carrying the eggs. Reproduction occurs year-round and generation time is short. (Barrows et al. 2008 and references therein).
The Alligator Pipefish has a wide geographic range, being found in seagrass habitats in warm waters of the Indian and Pacific oceans. The range extends from the northern Red Sea and the eastern coast of
Africa eastward to Japan, Samoa, the Tonga Islands, and Australasia (Dawson 1985, cited in Barrows et al. 2008).