Fighting Conch

Care at a glance

Overview

A dedicated sand-bed sifter that spends its day plowing through the substrate for detritus, diatoms and film algae, leaving the sand noticeably cleaner and better aerated behind it. Despite the name, it is peaceful toward fish, corals and other invertebrates. The fighting conch label comes from how males shove and jostle rival males away from females at breeding time, not from any aggression toward tankmates. The real risk is starvation in an older, very clean tank once the sand bed runs low on food, so watch for a conch that has stopped actively foraging and supplement with sinking algae wafers or pellets if needed.

In the wild

Strombus alatus lives on sand and rubble bottoms and in seagrass beds along the western Atlantic and Gulf of Mexico, from North Carolina down through Florida and west along the Gulf coast to Texas and the Yucatan. Wild conchs shift with the seasons, moving into deeper water over winter and back into the shallows in summer to spawn. In the aquarium it wants a fine sand bed several centimetres deep to plow through, since it spends nearly all of its time on or just under the sand rather than climbing rock.

Good to know

Strombus alatus is a true conch in the family Strombidae, recognized by the flared, wing-like outer lip of the adult shell that gives the species its name, alatus being Latin for winged. Like other strombid conchs it carries an eye on a long stalk on each side of its head and a claw-shaped, sickle-like operculum that it uses to flip and pole-vault across the sand rather than gliding like a typical snail. It reaches a mature shell length of roughly 7–8 cm, with larger individuals recorded in the wild.

Did you know

The fighting conch does not fight its tankmates. The name comes from the shoving matches males have with rivals over females at breeding time, brief pushing contests that leave nothing worse than a bruised ego.

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