Male-cod ●

: Males use visual cues, such as circling and extending their pelvic fins, during courtship.

While cod generally lack obvious external differences between sexes, specific secondary sexual characteristics are vital for male reproductive success. male-cod

: Successful courtship concludes with a ventral mount , where the male swims beneath the female, grasping her with his pelvic fins to release sperm as she releases eggs. Morphological and Genetic Traits : Males use visual cues, such as circling

: Studies describe the cod mating system as a "lek," where males assemble to perform competitive displays. This behavior includes: : Males use visual cues