Figure 1From: How populations differentiate despite gene flow: sexual and natural selection drive phenotypic divergence within a land fish, the Pacific leaping blennyThe Pacific leaping blenny ( A. arnoldorum ) is a marine fish that spends its entire adult life on land. Adult males have a prominent head crest (A), which is absent in females. Five populations (B) at various distances from one another were studied around the island of Guam.Back to article page