CHATTANOOGA, Tenn. (AP) - As if carving scary faces into a pumpkin wasn't already difficult, SCUBA divers at the Tennessee Aquarium will be carving jack-o-lanterns underwater in 1 of the aquarium's freshwater tanks.

On Monday morning, guests can watch two costumed divers in a friendly competition to come up with the best jack-o-lantern design while bass, paddlefish and gar swim nearby in the Lake Nickajack exhibit. The carvings will be posted online on the aquarium's Facebook page where fans can vote for their favorite design.

The aquarium has a number of fall events planned, including a Halloween party on Oct. 26.

Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.