Michel Leclerc*
Immunocompetent cells were described in the sea star Asterina gibbosa: They recognize specifically various antigens as HRP (Horse-radish peroxydase),Alkaline phosphatase, and trypsin. On the other hand when certain Asterina gibbosa were immunized with Bence-Jones protein, other ones with Rat IGG: A crossed immune reaction occurs. The potential sea star immune system is not broad enough to detect such antigens.