Where there is electrical equipment, dust and water, there are various ratings: 

https://en.wikipedia.org/wiki/IP_code

IP65 is a common rating, meaning no dust gets in and protected against water jets. The IP ratings cover immersion between 1 and 3 metres, but sharks can dive as deep as 2000 m. The Great White dives down about 1200 metres. The record for human submarines is 1000 m.

The prototype shark used is rated as hand washable at 30°C. Kitchen sink depth is -1 metre, so I believe the system is safe so long as the laser is removed while the shark is immersed.