Fig. 2From: 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 levelsMorphological changes in claspers. a Claspers at 4 months old (in October 2008). b Claspers exceeded the distal end of the pelvic fins at 5 years and 4 months of age (in October 2013). Arrowheads indicate claspers; arrows indicate pelvic finBack to article page