Euidotea durvillei, known commonly as the red seaweed isopod, is a species of marine isopod found in New Zealand.
Adults reach in length. Body is red with a lightly coloured stripe down its back. The leading edge of each segment on the exoskeleton is curved towards its head. The tail section curves outwards.
Euidotea durvillei is found on red seaweeds in the low to shallow subtidal regions of the intertidal zone of rocky shores.
The red seaweed isopod is a nocturnal grazer feeder, feeding on red seaweed. It camouflages itself against the red seaweed on which it also lives.