Salarias fasciatus, commonly known as the Jewelled Blenny, is a small, reef-dwelling fish known for its striking coloration and unique behavior. It inhabits shallow coral reefs in the Indo-Pacific region. Notable for its algae-scraping feeding habits, it plays a crucial role in controlling algae growth on reefs. This species exhibits territorial behavior and has a distinctive ability to 'hop' between rocks using its pectoral fins.

Salarias fasciatus, commonly known as the Jewelled Blenny or Lawnmower Blenny, is native to the Indo-Pacific region. Its geographical distribution includes the eastern coast of Africa, the Red Sea, and extends eastwards to the islands of the central and western Pacific Ocean, including areas such as the Great Barrier Reef in Australia and the islands of Micronesia.

The Jewelled Blenny typically inhabits shallow coastal waters, often in coral reef ecosystems. It is found at depths ranging from 1 to 10 meters, favoring areas with abundant coral and rocky substrates. The species thrives in warm tropical waters with temperatures typically between 24°C and 28°C.

Salarias fasciatus is primarily a herbivorous species, feeding on algae that grow on rocks and coral substrates. This makes it an important species for controlling algal growth on reefs, which helps maintain the health and balance of coral ecosystems. The species is well adapted to its niche, using its specialized mouthparts to graze on algal surfaces. Additionally, the Jewelled Blenny is known for its territorial behavior, often defending its chosen area from other fish.