"clam lake" ?
This reminds me of an awesome feature of 5E, which is Druid specialties. I am looking forward to my Beach Druid. I am not sure about how Larian will do animal companions, however. I want my animal companion to be a chariot-riding clam named Spartucus. His chariot is pulled by magic mice, and he attacks furiously with his tiny spear. He has a great natural armor class, of course, as all clams do, but he is a little wary of octopuses. He can breathe air, although he prefers to be put into a glass of water for sleeping at night ... no problem, Spartucus!