Monotaxis grandoculis

The Mu (name of the fish in Hawaiian) is a frequent and fascinating host of the reef. Its teeth strongly recall that of the gilthead sea bream and indicate a diet based on shellfish and crustaceans. It is recognized by its abrupt forehead and big eye. It has a cousin of smaller size, heterodon monotaxis, displaying a red hue and yellow tail structure.

One observes the Mu generally at the sand-rock limit, or in shallow areas, amidst the coral structure. Wary, it slips imperceptibly towards the bottom. Mu is often in mixed-size groups, sometimes several dozen individuals.

One of its characteristics is to be able to change color and pattern very quickly (appearance of vertical bars or a black blotch on the flank) and to stay perfectly still in mid-water.

Mu is mainly hunted through static or mobile agachon, a direct approach being generally deemed to fail. Mu is naturally very suspicious of humans and maintains a large safety distance, typically 4m or more from the tip of the shaft, which is a challenge given its small size. Fortunately it is a target that moves slowly which allows to aim well.

The flesh of the Mu is to my opinion too hard to be eaten raw but is tasty when cooked. Because of its wariness, its sea bream looks, and its proximity to the reef, European spearos are attracted to it. A good catch for good spearos though.