sentence: Sticklebacks have strong separated spines in the dorsal fin.
sentences_after: All species show similar mating behaviour, with co-operation between the sexes, and protection of the eggs. The males construct a nest from vegetation held together by secretions from their kidneys. The males then attract females to the nest. The females lay their eggs inside, where the males fertilise them. The males then guards the eggs until they hatch.
concept_name: stickleback
headings: Stickleback
categories: Teleosts