Malibu Shark Attack (2009)

When an earthquake releases the supposedly extinct goblin sharks my the depths of the ocean, the first thing they do is start eating humans. No one shall ask why these deep water sharks who've been in darkness for years don't have issues with sunlight, or why they wouldn't suddenly develop a taste for human flesh.

Just when you think things couldn't get any worse for the  beach goers and lifeguards, they are hit with a tsunami.   Oh hell no!  Head for the hills because a giant wall of water filled with goblin sharks it coming to a beach near you.  Oddly enough, the wooden lifeguard tower easily survives this natural disaster. So hurrah!  Everyone will be perfectly safe unless the goblin sharks figure out how to make holes in the floor... oh. Who knew that blood likes to burrow down through a foot of water and right through the floor boards where goblin sharks wait to bash their heads against said floor.

The lifeguards and a few people working at a new construction project seem to be the only ones affected by the tsunami of sharks.  Oddly enough some of the construction workers decide to swim for it rather than stay at in the building which is above water and shark free. Chomp.

This follows the typical story line of killer sharks who appear to be more intelligent than the humans who are trying to escape from them.  This is your standard Syfy channel movie.