Portunus pelagicus, also known as the
flower crab,
blue crab,
blue swimmer crab,
blue manna crab or
sand crab, and
alimasag in Tagalog, is a large
crab found in the intertidal
estuaries of the Indian and West Pacific Oceans, and as a
Lessepsian migrant in the eastern
Mediterranean Sea. The name "flower crab" is used in east Asian countries while the latter names are used in Australia. The crabs are widely distributed in eastern Africa, Southeast Asia, East Asia, Australia,
Persian Gulf and
New Zealand.