Trumpetfishes and Cornetfishes

Trumpetfishes and Cornetfishes in Hawaii

Trumpetfishes and cornetfishes are slender reef predators with long bodies and tube-shaped mouths. In Hawaii, both are called nunu or nuhu. They often move slowly near reefs, rocky areas and coral heads while watching for small fish.

Their long shape helps them blend into the reef. Sometimes they hover almost still, or even hold a vertical position near coral, waiting for prey to come close.

How They Hunt

These fish use stealth more than speed. They stalk small fish, get close, then open their tube-like mouths quickly. The sudden movement creates suction that pulls prey inside.

Their mouths can expand wider than expected, allowing them to swallow fish that seem surprisingly large for such a narrow predator. This makes them fun to watch if you stay calm and give them space.

Trumpetfish vs. Cornetfish

Trumpetfishes and cornetfishes can look similar at first. Trumpetfishes usually have stiffer, straighter bodies and barely bend while swimming. Cornetfishes are also long and thin, but their bodies flex more as they move.

Look for them near reef edges, coral heads and small fish schools, especially in the morning or late afternoon. Related pages include the Hawaii fish guide, needlefishes, lizardfishes, hawkfishes and Hawaii snorkeling tours.