Aquatics - Fish fins and scales

Fin and scale types and their function

Similarities in all fish

Gills, fins and scales

What is convergent evolution?

Two different species with similar characteristics

Function of Dorsal Fin

Stability and streamlining

Function of Adipose Fin

Stability in fast moving water

Function of Caudal Fin

Propulsion and generates forward movement

Function of the Anal Fin

Stability and can be modified for breeding and courtship displays

Function of Pelvic Fin

Balance and directional movement

Function of Pectoral Fin

Directional movement and propulsion

What are the 4 types of scales?

Placoid, Cosmoid, Ganoid, Cycloid and Ctenoid

What aquatic species have Placoid scales?

Sharks and Rays

What aquatic species has Cosmoid scales?

Lungfish

What aquatic species has Ganoid scales?

Sturgeons and paddlefish

What aquatic species have Cycloid and Ctenoid scales?

Most bony fish