Fifteen-Spined Stickleback (Sea Stickleback)
Spinachia spinachia
This elongated stickleback has a row of small spines along its back, and the males build nests from plant materials, protecting the eggs inside. Around Lihou, you might occasionally spot them in rockpools or among seaweed if you search carefully at low tide. Observing a guarding male offers a fascinating glimpse of parental care in fish.
- Habitat: Shallow, weedy areas of rocky shores and estuaries; can appear in pools at low tide.
- When to See: Most likely in spring and summer months during breeding.
- Length: Can reach around 15 cm