Heteroclinus roseus, the Rosy weedfish, is a species of clinid native to the Pacific Ocean coasts around Japan, Australia and Vanuatu, where it lives in coastal belts of seaweed. This species can reach a maximum length of TL. The Rosy Weedfish is known for being able to blend into its seagrass or coral surroundings with its pink or rosy coloration mixed with irregular dark markings.