Explain how most fish reproduce similarly?

Fishes undergo both asexual and sexual mode of reproduction with majority of fishes reproducing by sexual mode

Explanation:

Fishes undergo sexual reproduction. The sperm from the male fuses with the eggs of females. Some of the fishes have separate female and male sexes while some are hermaphrodites and have both testes and ovaries. Some species of fishes reproduce through parthenogenesis in which female egg develops into baby fishes without fusing with a sperm cell. Due to this, the offspring are exact copies of their mothers

its going to be mutualism cuz they both benefit from the relationship.

~batmans wife dun dun