Dan had these amazing Hawaiian endemics in a tank in his lab. It is an utterly self-contained world it lives in, feeding on algae and bacterial mats. Sold in pet stores here, an individual can live up to 20 years.
Small crab found on stony beach.
I'm trying to decide whether those rear appendages belong to the Portunidae or not. They look quite similar to Carupa tenupies which is listed as present in this area by WoRMS.
The decapods or Decapoda (literally "ten-footed") are an order of crustaceans within the class Malacostraca, including many familiar groups, such as crayfish, crabs, lobsters, prawns and shrimp. Most decapods are scavengers. The order is estimated to contain nearly 15,000 species in around 2,700 genera, with approximately 3,300 fossil species. Nearly half of these species are crabs, with the shrimp (c. 3000 species) and Anomura (including hermit crabs, porcelain crabs, squat lobsters: (c. 2500 species), making up the bulk...