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The surge wrasse (Thalassoma purpureum) is a species of marine fish belonging to the family Labridae. It is also known as the bluehead wrasse or the blue-throated wrasse. It is found in the western Atlantic Ocean, ranging from Florida and the Bahamas to Brazil.
The surge wrasse has a colorful appearance, with a greenish-blue body, a blue head, and a purple throat. Juveniles have a more muted coloration with a yellowish-brown body and a black spot at the base of the tail fin. It can grow up to 30 centimeters (12 inches) in length.
This species is typically found in rocky and coral reef habitats, where it feeds on small invertebrates such as crustaceans and worms. It is a peaceful fish that can be kept in a community tank with other non-aggressive fish, but it may become territorial with other wrasses or similar-shaped fish.