Centroceras clavulatum

Description: Alga filamentosa com as extremidades em furca (Y). Usually dark red in appearance. Size is 1mm diameter with two branches often curving upward, creating a clawlike appearance up to 0.5-5cm long.

Habitat: grows in tufts and mats in lower tidal habitats tidepools reef flats.

(In: http://www.coralreefs.hawaii.edu/ReefNetwork/marlife/seaweeds/seaweeds%20descriptions.htm)