Noun: three-spined stickleback
- Small fish with three prominent spines on its back, found in fresh, brackish and coastal waters
"Three-spined sticklebacks build nests to protect their eggs";
- Gasterosteus aculeatus
Derived forms: three-spined sticklebacks
Type of: prickleback, stickleback
Part of: Gasterosteus, genus gasterosteus
Encyclopedia: Three-spined stickleback