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Many stickleback traits can vary a great deal between freshwater populations, including the number of bony lateral plates, a few of which can be seen towards the posterior edge of this mesh, and the number and length of gill rakers and pharyngeal teeth, which can be seen inside the mouth. Three subspecies are currently recognized by the IUCN:
The stickleback family, Gasterosteidae, was first proposed as a family by the French zoologist Charles Lucien Bonaparte in 1831. [1] It was long thought that the sticklebacks and their relatives made up a suborder, the Gasterosteoidei, of the order Gasterostiformes with the sea horses and pipefishes making up the suborder Syngnathoidei.
Pungitius hellenicus, the Greek ninespine stickleback or ellinopygósteos, is a species of fish in the family Gasterosteidae. It is endemic to Greece. Its natural habitats are rivers and freshwater spring. It is threatened by habitat loss and considered critically endangered in the International Red List of IUCN, Bern Convention (Appendix III).
Threespine stickleback. Family Gasterosteidae (Sticklebacks) Fourspine stickleback (Apeltes quadracus) Brook stickleback (Culaea inconstans) Threespine stickleback (Gasterosteus aculeatus) Blackspotted stickleback (Gasterosteus wheatlandi)
The ninespine stickleback (Pungitius pungitius), also called the ten-spined stickleback, is a freshwater species of fish in the family Gasterosteidae that inhabits temperate waters. It is widely but locally distributed throughout Eurasia and North America. Despite its name, the number of spines can vary from 8 to 12.
Spinachia is a monospecific genus of ray-finned fish belonging to the family Gasterosteidae, the sticklebacks.The only species in the genus is Spinachia spinachia, the sea stickleback, fifteen-spined stickleback or fifteenspine stickleback, a species which lives in benthopelagic and in brackish environments of the northeastern Atlantic Ocean.
The smallhead stickleback (Gasterosteus microcephalus), or resident threespined stickleback, is a fish species, which widespread in the basin of the Pacific Ocean: Japan, also Mexico. Freshwater demersal fish, up to 5.5 cm (2.2 in) length. Habits small streams, where feeds on aquatic insects and other invertebrates. [1]
Apeltes is a monospecific genus old ray-finned fish belonging to the family Gasterosteidae, the sticklebacks.The only species in the genus is A. quadracus, the fourspine stickleback or bloody stickleback, which lives in freshwater, brackish and benthopelagic environments of the northwestern Atlantic Ocean between Newfoundland and South Carolina.