Blue walleye
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The blue walleye, also called the blue pike, was a unique color morph of walleye which was endemic to the Great Lakes of North America. Morphometric studies led biologists to classify the blue walleye
Blue walleye
Blue color variant of the yellow walleye
Polymorphism (biology)
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In biology, polymorphism is the occurrence of two or more clearly different morphs or forms, also referred to as alternative phenotypes, in the population of a species. To be classified as such, morph
Blue walleye
…The blue walleye (Sander vitreus var. glaucus), also called the blue pike, was a unique color morph (formerly considered a subspecies) of walleye which was endemic to the Great Lakes of North America. Morphometric studies led biologists to classify…
Light-morph jaguar
Dark-morph or melanistic jaguar (about 6% of the South American population)
The white morph of the monarch in Hawaii is partly a result of apostatic selection.
Darwin's finches by Gould