Yellow boxfish [Ostracion cubicus]

x yellow boxfish

The Yellow boxfish, Ostracion cubicus, is a boxfish of the genus Ostracion, and can be found in reefs throughout the Pacific Ocean and Indian Ocean as well as the south eastern Atlantic Ocean. It reaches a maximum length of 45 cm.

As the name suggests, it is box shaped. When juvenile, it is very bright yellow in color. As it ages, the brightness fades and very old specimens will have blue-grey coloration with the faded yellow. It feeds mainly on algae, but will also feed on sponges, crustaceans and mollusks. (text source: wikipedia)

Picture: Andaman&Nicobar Islands, India by Sami Salmenkivi


Sohal surgeonfish [Acanthurus sohal]

The sohal surgeonfish or sohal tang is a Red Sea endemic which grows to 16 inches in the wild. Its striking blue and white horizontal stripes has made it what many consider the ‘poster fish’ for the Red Sea reef environment. It is a valued aquarium fish.

Like other tangs, the sohal tang is compressed laterally, making it extremely maneuverable and fast along the reef. It has a horizontal, blade-like spine along the base of the tail on both sides, which folds into the fish, pointing anteriorly towards the head. During defence and aggression, tangs flick the spine at other fish or intruders, causing physical harm. The surgeonfish are named for this scalpel-like spine.

Its primary diet consists mostly of vegetable matter but occasionally includes the flesh of other animals. Sohal tangs have been known to nip clam mantles and munch on soft large-polyp and small-polyp stony corals. Its range includes all reef environments in the Red Sea, up to at least 90 feet in depth. It is one of the most aggressive tangs, and combined with its large size for a tang, is a dominant fish along the Red Sea reef. (text source: wikipedia)

Picture: Red Sea, Egypt by Sami Salmenkivi

Powder blue surgeonfish [Acanthurus leucosternon]

Acanthurus leucosternon is a tropical fish with the common names Powder blue tang and Powder blue surgeonfish.

The powder blue tang is light blue with yellow and white highlighted fins. Its face is a uniform black with a white outline. The fish doesn’t undergo color changes as it matures as some tangs, surgeonfish and unicornfish do. The species can grow to a maximum length of 25cm. The powder blue tang, like most in the Acanthuridae family is omnivorus eating mostly benthic algae.

Acanthurus leucosternon’s natural distribution is in the Indian Ocean in clear reef settings, from Indonesia and Christmas Island westward to eastern Africa to the Andaman Sea. (text source: wikipedia)

Picture: Andaman&Nicobar Islands, India by Sami Salmenkivi

Atlantic blue tang surgeonfish [Acanthurus coeruleus]

Acanthurus coeruleus also known as the Atlantic blue tang surgeonfish (or the blue tang for short) is a surgeonfish found commonly in the atlantic ocean

Although the body of the fish can vary in shaded from light to dark blue, both the dorsal fin and the anal fin are covered in bright blue on their edges. Their colors change during growth from a yellow juvenile and the blue adult phase.

Acanthurus coeruleus is common off of Florida, the Bahamas, and other places in the Caribbean sea. It is also common in the Gulf of Mexico. they are found south to Brazil and north to New York and eat krill. (text source: wikipedia)

Picture: Roatan, Honduras by Sami Salmenkivi