It belongs to the Whaler family with the typical Whaler tail and is a brownish yellow colour. It has a large second dorsal fin. It prefers shallow water and will often be found close to the sandy bottom in lagoons. Adult sharks tend to be more active at night but young sharks can often be seen during the day. Studies have shown that they generally stay in a small area without making any long trips.
Adults are usually shy of divers but if they feel threatened they can become aggressive.
There is a good photo of a Lemon Shark biting the fin of a scuba diver in Mac McDiarmid's book ' Shark Attack'. Late last year a friend told me about a discovery the made accidentally. This particular dive site was very seldom dove and was known mostly by locals. I was invited to take a look the following week and found that not only were their many sharks but quite big. We determined that the sharks are lemon sharks and range to a length of 10 foot and numbering up to 14 at a time.