Bridled Burrfish

Also called Bridled Pufferfish.

Found singly, usually over seagrass beds, close to coral reefs, in bays and coastal lagoons.

Porcupinefish spines lay flat, but when threatened they can inflate like a "football with spikes" so the spines are facing outwards to deter prey. The have a plated mouth structure for crushing shells or "fingers".
Can give a nasty bite!