The Weedy Seadragons, unlike seahoses, do not have a pouch for rearing the young. The male seadragons carry the eggs fixed to the underside of its tail. The average size of adult Weedy Seadragons is approximately 30cm in length, but they can grow to 45cm. They have a long pipe-like snout, very similar to seahorses only longer, with a small terminal mouth. The females are normally bigger than the males and have deep bodied.
The Weedy Seadragons are endemic to Australian temperate waters. They can usually be found among kelp-covered rocky reefs from central NSW to south-western WA. Around Sydney, they can often be found at Kurnell and sometimes at Bare Island.