With horned skin and spiked gills, the armoured sea robin is a rare species of fish found only in deep tropical waters.
But unlike other fish, armoured sea robins also have feet which they use to scuttle around the ocean floor.
The fish uses its thickened, stiff fin rays to skulk along the bottom instead of swimming.
Frightened fishermen off the Darwin coast had no idea what type of creature they had stumbled across and likened the fish to a translucent aquatic dragon.
The horned fish are known as bottom-feeders and are seldom found in waters less than 200 metres deep.
Armoured sea robins are one of 45 species in the Peristediidae family and are a rare breed.