The Stickleback - 1915 was released on: USA: April 1915
External, like most fish.
The Stickleback - 1913 was released on: USA: 11 March 1913
A four-horned sculpin eats a three spined stickleback. Interesting...............................
internal
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A stickleback is a type of small fish that belongs to the Gasterosteidae family. They are found in marine, freshwater, and brackish environments around the world, including the Pacific and Atlantic oceans, as well as lakes and rivers in North America and Europe.
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Brook stickleback fish live to about one to two years occasionally three years.
Nancy Chambers has written: 'Pim and the fisherboy' -- subject- s -: Children's stories 'Stickleback, Stickleback'
A Stickleback is a vertebrate. It has a backbone on it's back. all fishes, reptiles, mammals and birds are all vertebrates.