What is R Selection?
What is R Selection? One of two reproduction strategies for species, compared to its opposite […]
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What is K Selection?
What is K Selection? One of two reproduction strategies for species, compared to its opposite, […]
What is an Interdorsal Ridge?
What is an Interdorsal Ridge? The interdorsal ridge is an area between the first and second dorsal fins […]
What is Homocercal?
What is Homocercal? Homocercal describes a caudal (tail) fin with lobes of the same size. It […]
What is Heterocercal?
What is Heterocercal? Heterocercal describes a caudal (tail) fin with different-sized lobes. ###
What are gill rakers?
What are gill rakers? Gill rakers are one or a series of projections that extend […]
What are gill slits?
What are gill slits? Gill slits are the vertical openings on either side of the […]
What are gills?
What are gills? Gills are a paired set of respiratory organs that allows fish and some amphibians […]
What does Ectotherm mean?
What does Ectotherm mean? Also known as cold-blooded, these animals need an external heat source […]
What is Sexual Dimorphism?
What is Sexual Dimorphism? Sexual Dimorphism is the physical difference between male and female individuals […]