I'm a Dragon!
Seen during a black water dive, this is most likely a juvenile of Bentstick Pipefish during pelagic phase. Despite a juvenile, it is around 12-15 cm in length but very slender/thin. It has 2 long appendages behind its head and a few others towards the tail. The adult of this species looks more 'ordinary' and usually found on sandy and seagrass bottom, looking like a Stick, hence its common name, Bentstick.
The bentstick pipefish occurs in marine waters throughout much of the Indo-West Pacific. In Australia it lives in bays and estuaries on sand or mud, from the shallows to at least 40 m depth.
Variable in colour from whitish to yellowish, greenish, brown or black, usually with fine speckling and a series of pale saddles. These long slender pipefish often raise themselves off the bottom, bending their heads at an angle to feed on zooplankton drifting by in the current.