Book 30, Question 72
How does a stickleback dad take care of his eggs?
Male sticklebacks are small fish that build nests out of plant pieces, glued together with a sticky thread.
A female lays eggs in the nest, and the male guards it and fans the eggs with his fins to bring oxygen. After the eggs hatch, he keeps the baby fish nearby. Sticklebacks live in cool ponds and streams and have spiny fins on their backs.