SOLVED. Children action book, 2009-2012. [s]

[Rachel]

Hi everyone! This is a series of books I read in elementary school. Its about four kids who are put together on a team to find lost treasure in the ocean I think. One of the girls is a competitive swimmer and her name is Starr. She gets bends in one of the books. One part of the book is them trying to figure out who sabotaged their crashed submarine. Would appreciate any help!

[Rachel]

Oh my this is the exact series! You are a godsend thank you so much?

[Kris]

Glad you found your book series, Rachel. Here's the link for the first book - Emilie's find - The Discovery by Gordon Korman.