There seems to be two broad categories of products: those for pools and those for beaches. Here's a shortlist of systems for pools: Coral Manta, SwimEye, Mobot

There seems to be two broad categories of products: those for pools and those for beaches. Here's a shortlist of systems for pools: Coral Manta, SwimEye, Mobotix, Axis, AngelEye, Argusmatik, Poseidon, Zwembadcamera, Optoswim, Dipsee A.I., and Lynxight Deep Vision. For beaches there's: Milestone, Coastalcoms, etc., and two of the above companies also do beaches: Dipsee A. I., and Lynxight Deep Vision.