Cossura consimilis

Cossura consimilis is a polychaetid worm that was distributed throughout New Zealand. "Cossura consimilis" is a slender thread-like worm with a blunt head, growing up to 20mm in length. "Cossura consimilis" live in muddy sand in shallow intertidal harbours and estuaries, to the inner continental shelf and out to the continental slope. "Cossura consimilis" tolerates a sediment mud content of 5 to 65%, with an optimum range of 20-25%.