I believe I just saw a few lemon sharks while snorkeling on an uninhabited island's lagoon just to the north of me. We were doing a cleanup on the beach to make it presentable and I went out to recce the reef as a potential divesite.
Heading back I first saw one shark approx 3ft long but couldn't identify it as the water in the middle of the lagoon had lower vis and a temperature drop. Depth was maybe 5ft. Another approx 4ft came in to view and then I think another... or the first one circled back.
They were not blacktip reef, whitetip reef, nurse, guitar or zebra. These are the main sharks I would expect to see in the shallows around here in the Maldivian lagoons. I'm guessing lemon due to the colour and fairly mean looking appearance. I have the Debelius' Shark and Ray book, and I reckon they're lemons.