Chiridotea coeca, the sand isopod, is a species of isopod crustacean found in the western Atlantic Ocean, from Nova Scotia to Florida.

Adult sand isopods are horizontally flattened.

[2] The thorax is almost round from above and the long, robust legs with large setae.

When removed from the tunnels (for instance, by wave action), sand isopods swim down to the substrate, where they dig underground again.

Chiridotea coeca feeds on carrion, which it holds with its gnathopods while chewing pieces off with its mandibles.