"Submerged hideaway"

Outside of his home, there's very few places this lizard can relax; he's so intensely shy, that even the CHANCE of people seeing him makes him uncomfortable. This, however, is one of the places he likes. Below the normal bottom of a certain lake, there's a cave with nothing in it, not even fish. The perfect place for him. He's spent a lot of time there, enjoying the relief of knowing that nobody will happen across him, and he's personalized the place a little as well. The very bottom of the cave connects to a different cave system that leads to the surface, and while there's no possible way he could fit through, a hose could, and he set one up so he can breathe through it and stay much longer than normal. Sometimes he even finds himself sticking around for over an hour...