Fish brains and sensory organs may vary greatly between species. With an estimated total of 25 000 species, fish represent the largest radiation of vertebrates. From the agnathans to the teleosts, they span an enormous taxonomic range and occupy virtually all aquatic habitats.
“The following is a tutorial on how to create an extension tube / reverse mount for a standard 18-55mm lens using common plumbing supplies found at your local hardware store.”