This is the Lake.

Available Pokemon to capture:

1. Magikarp
2. Poliwag
3. Goldeen
4. Tentacool
5. Staryu
6. Tentacruel
7. Shellder
8. Chinchou
9. Lanturn
10. Krabby
11. Horsea
12. Psyduck
13. Slowpoke
14. Kingler
15. Seadra
16. Gyarados (Rare)