Casio Men's Analog Twin Resist Watch TRT300-1B

This watch water resistant as far deep as 50 meters, where no living thing can survive anyway, apart from certain squids and eels!
And, more useful to the mudshark in you, the TRT300-2BV sports Mud Resistant Controls
Electro-luminescent backlight
Regular timekeeping: Three hand analog (Hour, Minute, Second)
Accuracy: +/- 20 seconds per month
Battery lasts approximately two years
Round blue case with blue resin compound strap