Tobey and Leo's Scuba Adventure

8/14/2006 8:50 PM PDT

Tobey and Leo's Scuba Adventure

Tobey Maguire was more Aquaman than Spiderman this weekend during a private scuba lesson in Hawaii. Floating next to good friend Leonardo DiCaprio, Tobey was all smiles as he splashed around the Pacific Ocean with a group of beach buds.

The big screen stars and Hollywood Hills neighbors have been spotted enjoying the island beaches all week, along with Tobey's pregnant fianceé, Jennifer Meyer, Lukas Haas, and an unidentified blonde (possibly Leo's rumored new squeeze, Bar Refaeli).