Noun
water police (uncountable)
The police department charged with patrolling harbours and waterways by boat.
A short time later, less than a kilometre away at Mettams Pool, a member of the public spotted a three metre shark 50 metres offshore and contacted the Water Police. Source: Internet
Brisbane Water Police were notified of the discovery and quickly swung into action, initiating a rescue mission involving a helicopter, 4 police vessels, a jet ski and volunteer Coast Guards. Source: Internet