blue streak, a
a composite garden plant, Catananche caerulea, of southern Europe, having very hairy leaves and blue flower heads, used by the ancients as a love potion.
an edible Australian crab, Portunus pelagicus. noun an edible bluish Australian swimming crab, Portunus pelagicus (Austral, informal) an Australian ten-dollar note
blueweed (def 1).
See under pikeblenny. any of several tropical American clinid fishes of the genus Chaenopsis, as C. ocellata (bluethroat pikeblenny) the male of which is noted for its aggressive behavior in defending its territory.