For one dexterous octopus, an attempt at a great escape turned into a great flood Thursday at the Santa Monica Pier Aquarium in California.

The female California two-spotted octopus swam to the top of her tank, disassembled a valve with her powerful arm, and released at least 200 gallons (757 liters) of seawater into nearby exhibits and offices.

The foot-long (0.3-meter) creature remained in her tank and survived her ordeal. But the aquarium's brand-new floors weren't so lucky.

Such high jinks are typical of the invertebrates' still unexplained smarts, experts say.

"Octopuses have a wonderful combination of intelligence, tremendous manipulative ability, curiosity, and strength," said Jennifer Mather, a psychology professor at Canada's University of Lethbridge who has studied cognition in octopuses.

"So the