Carapace parts washed up on a beach
A tiny crab, found under a rock at low tide. In this picture it it on the joint of my little finger.
Photo by Ian Nilsson
Crawling on the pickleweed, on a stream feeding Tomales Bay
Found under a rock at low tide.
Malacostraca is the largest of the six classes of crustaceans, containing over 25,000 extant species, divided among 16 orders. Its members display a greater diversity of body forms than any other class of animals, and include crabs, lobsters, shrimp, krill, woodlice, scuds (Amphipoda), mantis shrimp and many other less familiar animals. They are abundant in all marine environments and have also colonised freshwater and terrestrial habitats. They are united by a common Bauplan, comprising 20 body...