noctiluca

noun, plural noc·ti·lu·cae [nok-tuh–loo-see] /ˌnɒk təˈlu si/.

1. a dinoflagellate of the genus Noctiluca, capable of producing light and, in groups, of causing a luminous appearance of the sea.

noun plural -cae (-siː)

1. any bioluminescent marine dinoflagellate of the genus Noctiluca