Anatomy

Fancy Guppy Anatomy (Male)

Mouth - points forward.
Nostril - smell and taste (closely intertwined) is accomplished in the nasal openings, mouth and head.
Eye - almost spherical in shape, selective near/far focus. Eye structure suggests fish can see in colour.
Lateral line - line of scales with pores. Senses motion in water, extremely sensitive. Enables fish to control swimming.
Dorsal fin
Chin
Operculum (gill cover) - pumps water over gills for gas exchange.
Pectoral fin - paired "arms" - Used for fine movement backward and forward.
Pelvic (ventral) fin - paired "legs" - Used for stability in the water.
Gonopodium - modified anal fin of all live-bearing toothcarps. Used to introduce sperm to the female - has five rays.
Caudal peduncle - supports the caudal fin.
Caudal (tail) fin - many shapes. See Guppy Tails
Fin rays - fin support structure.