Threespine Stickleback
The three-spined stickleback, Gasterosteus aculeatus, is a small, adaptable fish found in both freshwater and marine environments across the Northern Hemisphere. Characterized by three sharp spines in front of its dorsal fin, this species is known for its complex mating behavior and ability to thrive in a wide range of habitats. Sticklebacks primarily feed on small invertebrates and are a popular subject in evolutionary biology due to their diverse forms and behaviors.
Length~4 (max 11)
Weight~1 (max 1)
WaterFresh, brackish, salt
Water Temp4-20° F
Depth100 ft
- Other names-
- Length~4 (max 11)
- Weight~1 (max 1)
- WaterFresh, brackish, salt
- Water Temp4-20° F
- Depth100 ft
Popular lures for Threespine Stickleback
Regulation for Threespine Stickleback
- Season-
- Bag limit-
- Vessel limit-
- Trophy limits-
- Max size-
- Min size-
- Measurement-
- Prohibited methods-
Living Conditions
🐟 Habitat preferences
- Found in freshwater, brackish, and coastal marine waters
- Prefers shallow, vegetated areas where it can find food and build nests
- Feeds on small invertebrates like insects, crustaceans, and zooplankton
- Highly adaptable, capable of surviving in a wide range of salinities and temperatures
♻️ Life cycle and mating behavior
- Males establish and defend territories during the breeding season, building nests from plant material
- After attracting a female, the male guards the eggs and fanning them to ensure proper oxygenation
- Juveniles remain in shallow areas, feeding on tiny invertebrates until they mature
- Sticklebacks are known for their elaborate courtship displays, which include distinct coloration and behavior changes