World's first wireless underwater drone" uses light instead of tether
BIKI: First Bionic Wireless Underwater Fish Drone by Robosea — Kickstarter
Powervision PowerDolphin Wizard Power Dolphin Wireless Underwater Drone with 12MP 4K Camera 1080P Video Fishing - AliExpress
introducing BIKI, the first bionic + wireless underwater drone
Underwater Drone Submarine Camera,Wireless Submersible Remote Control Underwater Drone with 4K HD Camera,WIFI Connection Bionic Design Fish Robot,Burst : Amazon.nl: Toys & Games
Amazon.com : 150M Tether Titan Professional Underwater Drone ROV AUV Robot with 4K UHD Action Camera Remote Control Real-time Steaming Undersea Detection for Viewing, Recording, Fishing, Salvage Work (150M Titan) : Electronics
World's first wireless underwater drone' replaces tether with light - Springwise