The Grey Triggerfish (Balistes capriscus), known in Maltese as Ħmar, is one of the most distinctive and intriguing species found in our Mediterranean waters. Its rugged texture, alert eyes, and sturdy oval body give it a commanding presence beneath the waves. More than just a striking fish, the Grey Triggerfish is an impressive example of adaptation, intelligence, and underwater tenacity.

This species belongs to the Balistidae family and is easily recognised by its laterally compressed shape and strong, leathery skin, which feels almost like fine sandpaper. One of its most remarkable features is the ‘trigger’ mechanism in its first dorsal fin.

When threatened or seeking shelter, the fish locks this fin upright and wedges itself tightly into crevices, making it nearly impossible for predators to dislodge it. This clever defence is where it gets its name.

Grey Triggerfish typically measure around 20 cm, though some individuals can grow up to 60 cm in length. Their colouring ranges from grey to greenish tones, sometimes decorated with soft blue hues or subtle patterns that shimmer in the light. They are usually found near rocky seabeds, reefs, shipwrecks, and sandy stretches with structures - common habitats around Malta, Gozo, and Comino, at depths of 10 to 100 metres. Divers often encounter them as curious onlookers, boldly approaching before retreating to a safe distance.

Their diet reveals their skill as persistent hunters. Grey Triggerfish feed on sea urchins, molluscs, crustaceans, and starfish, sometimes blowing jets of water to uncover hidden prey in the sand. During breeding season, males build and fiercely guard nests, becoming highly territorial.

Spotting a Grey Triggerfish while diving is a wonderful experience...just remember to admire respectfully. These bold guardians of the reef deserve our care and space in their underwater realm.

Have you ever seen a grey triggerfish in Malta?