Here are some interesting facts about blacktip sharks:

1. Blacktip sharks are a species of requiem shark, which is a family of sharks that includes other well-known species like the tiger shark and the bull shark.

2. They are named for the black tips on their dorsal and pectoral fins, which are particularly noticeable when the shark is swimming close to the surface.

3. Blacktip sharks are found in warm coastal waters around the world, including in the western Atlantic Ocean around Hilton Head Island, SC.

4. They are typically small to medium-sized sharks, with adults ranging from around 4 to 6 feet in length.

5. Blacktip sharks are known for their acrobatic leaps out of the water, often spinning or twisting as they jump. This behavior is thought to be related to feeding or mating.

6. Their diet consists mainly of small fish, but they will also eat crustaceans and occasionally other sharks.

7. Blacktip sharks are considered to be of low risk to humans, as they rarely attack people and most encounters are non-fatal.

8. In some parts of the world, blacktip sharks are caught for their meat, fins, and other products. As a result, they are listed as "Near Threatened" by the International Union for Conservation of Nature (IUCN).