Long-spine Porcupinefish

Scientific Name: Diodon holocanthus

Category: fish

Long-spine Porcupinefish

Brief Description

A medium-sized fish known for its ability to inflate its body and its defensive spines.

Characteristics

Covered in long spines that lay flat against the body unless threatened. It has large eyes, a beak-like mouth, and a tan to sandy-colored body with dark spots.

Habitat

Found in shallow tropical and subtropical waters, typically around coral reefs, rocky areas, and seagrass beds.

When to Find It

N/A

Conservation Status

Least Concern

Ecological Role

They are nocturnal predators that help control populations of mollusks, sea urchins, and crabs by crushing their shells with their beak.

Easily Confused With

Spot-fin Porcupinefish (Diodon hystrix), which is larger and has spots on its fins (D. holocanthus does not have spots on fins).

Observation Tips

Observe them in reef crevices during the day or swimming over the reef at night. Never intentionally harass them to make them inflate as it is highly stressful and can be fatal.

Interesting Facts

Porcupinefish can inflate themselves by swallowing water or air to appear larger and more difficult for predators to swallow. Many species also contain tetrodotoxin, a potent neurotoxin.