They protect the embryos until they hatch , and often look after the larval stages as well .
Guarding males keep the embryos safe from predators , keep oxygen levels high by fanning water currents , and keep the area free from dead embryos and debris .
males protect the embryos until males hatch , and often look after the larval stages as well .
Guarding males keep the embryos safe from predators , keep oxygen levels high by fanning water currents , and keep the area free from dead embryos and debris .