On the irreversible agglutination of the sperm caused by the sperm extracts in the sea urchins.
D000371:Agglutination; D000818:Animals; D004447:Echinodermata; D008297:Male; D012617:Sea Urchins; D013094:Spermatozoa
AGGLUTINATION; ECHINODERMS; SPERMATOZOA