Wet fun in the summer time! An entertaining popcorn movie with plenty of thrills and gore.

The movie starts with two young couples on a boat, dancing, drinking wine, and having fun. Their fun is interrupted when a nasty mako shark (smaller, but faster cousins to the great white) attacks their boat, looking for some humans to eat. It looks like he will catch himself a juicy young lady, when, in a send-up of Jaws (1975) the marauding mako is stopped dead in his tracks. The shark is now the victim of stud Carter Blake (Thomas Jane), who has deadly aim with a harpoon gun.

It turns out that Blake is the shark wrangler for a big pharmaceutical project headquartered on the floating laboratory Aquatica. Under the direction of Dr. Jim Whitlock (Stellan Skarsgård) and Dr. Susan McAlester (Saffron Burrows), compounds are being extracted from shark brains that could reverse the progress of Alzheimer's disease. It seems that our little boat attacker somehow escaped from the Aquatica.

McAlester has been given the word from corporate honcho Russell Franklin (Samuel L. Jackson) that after spending $200 million on the project, he is about to pull the plug. Susan pleads for just 48 more hours. Franklin will visit the lab, and will decide for himself if the research team is really close to a breakthrough.

Upon Franklin's arrival, Carter wrangles a mako up to the lab's main tank, Susan extracts some magic potion from its brain, and presto!! Inactive human brain cells get active again. Success!! Franklin is duly impressed and the celebration begins.

The joy quickly turns to horror as the mako, still in the tank, jumps up and bites off Dr. Whitlock's hand. (Talk about biting the hand that feeds you.)

Needless to say, Whitlock is losing blood fast, and the paramedics are called. Unfortunately, there is a terrible storm.

Help finally arrives, and the good doctor is extracted. Problems ensue, and before you know it, the paramedic helicopter crashes into the floating lab, causing multiple explosions and untold devastation.

All along, Carter has been concerned that the sharks are getting way too smart and aggressive. Susan finally admits that, in violation of genetic research protocols, she has been enlarging their brains, to get more magic potion faster. So, we now have three giant brain makos, on the prowl, in a damaged facility. Whoop-de-doo!

Franklin assumes charge, and scolds the group for fighting among themselves. All of a sudden, he is grabbed by a shark and is dispatched in seconds!

The quickly dwindling band, including Carter, Susan, biologist Janet Winters (Jacqueline McKenzie), engineer Tom Scoggins (Michael Rapaport--less annoying than usual), and chef Sherman "Preacher" Dudley (LL Cool J), must figure out how to escape the sinking facility--without getting eaten in the process.

Director Renny Harlin pays homage to numerous flicks as the body count increases. Only two are left alive at the end, and one of them is Carter. Besides all the fun, the pic could turn out to be a star maker for Thomas Jane and LL Cool J. Burrows doesn't turn in much of a performance, and we see very little of Skarsgård.

Pass the popcorn!