Cats are pretty well adapted to water despite the stereotypes, and fish are typical prey for many species. Tigers famously live along deltas, there are spotted

Cats are pretty well adapted to water despite the stereotypes, and fish are typical prey for many species. Tigers famously live along deltas, there are spotted wildcats which live in mangroves called "fishing cats", flat-headed cats stalk the waters around the Gulf of Thailand, even Pallas Cats have been known to go fishing in the steppes. Although, according to the article these lions started eating birds that live along the coastline because their usual mammalian prey are dying off from drought. It's pretty common for birds, especially migratory ones, to hang around saltwater while they feed on things like algae and small shellfish.