by and bubbler crabs (or sand-bubblers) are crabs of the genera Scopimera and Dotilla in the family Dotillidae.
They are small crabs that live on sandy beaches in the tropical Indo-Pacific.
They feed by filtering sand through their mouthparts, leaving behind balls of sand that are disintegrated by the incoming high tide.
Sand bubbler crabs are small crabs, around 1 cm (0.4 in) across the carapace, and they are characterised by the presence of "gas windows" on the merus of the legs.
Source
They are small crabs that live on sandy beaches in the tropical Indo-Pacific.
They feed by filtering sand through their mouthparts, leaving behind balls of sand that are disintegrated by the incoming high tide.
Sand bubbler crabs are small crabs, around 1 cm (0.4 in) across the carapace, and they are characterised by the presence of "gas windows" on the merus of the legs.
Source
