three-spine stickleback
English
Alternative forms
Noun
three-spine stickleback (plural three-spine sticklebacks)
- Gasterosteus aculeatus, a small fish of coastal and inland waters of the Northern Hemisphere, that can make its spines erect when threatened, which makes it hard to swallow.
References
three-spined stickleback on Wikipedia.Wikipedia 
Gasterosteus aculeatus on Wikispecies.Wikispecies 
Gasterosteus aculeatus on Wikimedia Commons.Wikimedia Commons
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