Fig. 4From: High-resolution monitoring from birth to sexual maturity of a male reef manta ray, Mobula alfredi, held in captivity for 7 years: changes in external morphology, behavior, and steroid hormones levelsSemen from No10–2. a Plastic tube inserted into the clasper. b Collected semen. c Giemsa-stained sperm. Scale bars = 20 μmBack to article page