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Common seadragon

Common seadragon
Phyllopteryx taeniolatus1.jpg
Phyllopteryx taeniolatus in Cabbage Tree Bay, Sydney, Australia
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Syngnathiformes
Family: Syngnathidae
Subfamily: Syngnathinae
Genus: Phyllopteryx
Species: P. taeniolatus
Binomial name
Phyllopteryx taeniolatus
(Lacepède, 1804)
Phyllopteryx tæniolatus range map.PNG
Phyllopteryx taeniolatus range

Common seadragon or weedy seadragon (Phyllopteryx taeniolatus) is a marine fish related to the seahorse. Adult common seadragons are a reddish colour, with yellow and purple markings; they have small leaf-like appendages that resemble kelp fronds providing camouflage and a number of short spines for protection. Males have narrower bodies and are darker than females. Seadragons have a long dorsal fin along the back and small pectoral fins on either side of the neck, which provide balance. Common seadragons can reach 45 cm in length.

The common seadragon is the marine emblem of the Australian State of Victoria.

The common seadragon is endemic to Australian waters of the Eastern Indian Ocean and the South Western Pacific Ocean. It can be found approximately between Port Stephens (New South Wales) and Geraldton, Western Australia, as well as Tasmania.

The common seadragon inhabits coastal waters down to at least 50 m deep. It is associated with rocky reefs, seaweed beds, seagrass meadows and structures colonised by seaweed.

These fish are slow-moving and rely on their camouflage as protection against predation; they drift in the water and with the leaf-like appendages resemble the swaying seaweed of their habitat. They lack a prehensile tail that enables similar species to clasp and anchor themselves.

Individuals are observed either on their own or in pairs; feeding on tiny crustaceans and other zooplankton by sucking prey into their toothless mouths. Like seahorses, seadragon males are the sex that cares for the developing eggs. Females lay around 120 eggs onto the brood patch located on the underside of the males' tail. The eggs are fertilised and carried by the male for around a month before the hatchlings emerge. Seadragons, seahorses and pipefish are among the few known species where the male carries the eggs. The young are independent at birth, beginning to eat shortly after. Common seadragons take about 28 months to reach sexual maturity, and may live for up to six years.


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