The Indian triggerfish also known as the black-finned triggerfish

Triggerfish

Triggerfishes are about 40 species of often brightly colored fishes of the family Balistidae. Often marked by lines and spots, they inhabit tropical and subtropical oceans throughout the world, with the greatest species richness in the Indo-Pacific...

, has a brown body and black fins with white lines at the base of the dorsal

Dorsal fin

A dorsal fin is a fin located on the backs of various unrelated marine and freshwater vertebrates, including most fishes, marine mammals , and the ichthyosaurs...

 and anal fins. It is found in the Indo-Pacific

Indo-Pacific

The Indo-Pacific is a biogeographic region of the Earth's seas, comprising the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the seas connecting the two in the general area of Indonesia...

 oceans. They can grow up to 10 inches (25.4 cm).

The Indian triggerfish usually feed on hard-shelled mollusks and echinoderms but some feed on algae

Algae

Algae are a large and diverse group of simple, typically autotrophic organisms, ranging from unicellular to multicellular forms, such as the giant kelps that grow to 65 meters in length. They are photosynthetic like plants, and "simple" because their tissues are not organized into the many...

 and zooplankton

Zooplankton

Zooplankton are heterotrophic plankton. Plankton are organisms drifting in oceans, seas, and bodies of fresh water. The word "zooplankton" is derived from the Greek zoon , meaning "animal", and , meaning "wanderer" or "drifter"...

. They are often very aggressive over their eggs but are otherwise harmless. Indian triggerfish are very easy to keep at home, Some are peaceful but some are very aggressive towards other fish.

These are not to be confused with their cousins, the Hawaiian Black Triggerfish or Black Durgon (Melichthys niger), which are often mistaken as being Indian Triggerfish within the trade.