Blunt-end Seahare

Overview

The Blunt-end Seahare (Dolabella auricularia) is a large marine gastropod recognized by its distinctive wedge-shaped body and flattened posterior disk. Often referred to as a "wedge sea hare," it is well-known for its effective role as an algae consumer in both natural reef environments and marine aquaculture systems.

Appearance

This species is characterized by a short, blunt head and a body surface covered in tubercles and skin flaps, which provide excellent camouflage against its surroundings. Its coloration is highly variable, typically featuring mottled shades of brown, green, and grey that help it blend into sandy or rocky substrates. The animal possesses a vestigial, ear-shaped internal shell and can reach significant sizes, with some individuals growing up to 40 centimeters in length.

Distribution & Habitat

Widely distributed throughout the Indo-Pacific region, including the Indian Ocean and the western and northwestern Pacific, this sea hare inhabits areas sheltered from strong currents. It is commonly found in intertidal rock pools, seagrass beds, and environments with sand or mud bottoms where it can easily conceal itself.

Biology & Behavior

Primarily nocturnal, the Blunt-end Seahare spends daylight hours hiding in crevices or under rocks. When threatened or disturbed, it is capable of ejecting a purple ink as a defense mechanism. It is a generalist herbivore that feeds on various types of algae. Beyond its ecological role, the species is of interest in biomedical research due to the presence of secondary metabolites in its tissues.