Fish Senses

• Fish commonly fall into 3 main groups:

  • Cold (Freshwater) 10-26C
  • Tropical (Freshwater) 21-29C
  • Tropical Marine 21-29C
• Fish Gill Structure

  A) Gill Fillaments

  B) Gill Rakers

  C) Gill Arch

  
• There are 4 pairs of gills attatched to a gill arch
• Each gill is supported by a gill arch
• Gill arch provides support to hold several comb-like structures called gill fillaments
• Gill fillaments extend out hotizontally from the gill arches
• The gill filament has tiny hair like projections called lamellae which increase surface area for gas exchange

  A) Gill Arch

  B) Gill Fillaments

  
• Water flows over the gill filaments through the mouth, past the operculum and back into the environment via the opercular opening
• Fish Diagram

  A) Mouth

  B) Gill Flap

  C) Pectoral Fin

  D) Pelvic Fin

  E) Anal Fin

  F) Dorsal Fin

  G) Caudal Fin