portunidae การใช้

• Crabs typically walk sideways ( a behaviour that gives us the word raninids, " Libinia emarginata " and " Mictyris platycheles " . the Portunidae especially so as their last pair of walking legs are flattened into swimming paddles.
• The chelipeds are usually robust, and in some the last pereiopod pair has ovate sternum between segments 4 to 8 are usually incomplete, and in the Portunidae, the eighth sternite is usually visible if seen from below and has a penial groove.
• ""'Liocarcinus vernalis " "', the "'grey swimming crab "', is a small, shallow-water crab in the family Portunidae . " L . vernalis " was thought for a long time to be a predominantly Mediterranean species, but its known range was extended by a series of observations in the 1980s and 1990s.