three-spined stickleback

English

Alternative forms

• three-spine stickleback

Noun

three-spined stickleback (plural three-spined sticklebacks)

1. 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