Fig. 7From: Variation of sperm morphology in Pacific oyster precludes its use as a species marker but enables intraspecific geo-authentification and aquatic monitoringGeographically assigned intraspecific sperm morphs typical for the Pacific oyster Crassostrea gigas in Primorye. a Sperm morph that is typical for the C. gigas in the Amursky Bay, b sperm morph that is typical for the C. gigas in the Eastern Bosphorus Strait, c sperm morph that is typical for the C. gigas in the Ussuriisky Bay, d sperm morph that is typical for the C. gigas in the Vostok Bay. Scale bar—1 µmBack to article page