Boomerang

A herbivore encountered in large numbers, found to frequent shallow waters and move in schools.

1. Serrated Teeth

Suggests adaptation for grinding corals other herbivores are unable to digest.

2. Twin-fins

Unusually, this species' two fins are a cartilaginous extension of its skeleton. They are less prone to damage and provide superior propulsion, but are also harder to grow back. The bright blue tips are in fact the ends of its digestive tract, where the luminescence of the corals it consumes is most focused. Most active during daylight hours, and prone to flee on approach, the boomerang can more easily be observed at night when its luminescence gives it away and it seeks the shelter of the seabed. Assessment: Edible