Biology of Finfish and Shellfish

4.6.4. Burrow Nest Spawners

Males guard the eggs to overcome oxygen depletion, the pelvic fin is developed into feathery thread like structure and they are highly vascularised and also act as gills. e.g.: south american lung fish.

1. Polyphils: Build their nests with miscellaneous materials. e.g.: arowana.
2. Ariadnophils: Fishes build their nests by using plant materials and these materials are held together by secretion of kidney. Once the fertilization is over, the males drive away the female from that area and take care of the eggs. e.g.: stickle backs.
3. Actinariophils: These fishes make use of sea anemones. They usually lay their eggs in and around sea anemones to avoid predation. e.g.: Amphiprion