Watership Down (1999)

Season 2: Episode 4

Finally making it to the Big Water the rabbits lose contact with Kehaar. The rabbits are amazed by their new surroundings, including the salty sea water. The rabbits soon realize the sea is getting closer to them. Meanwhile, Kehaar meets up with his old friend, Katerina, but soon realizes that she isn't as friendly as he thought she once was. The rabbits are helped by the Puffins after almost being taken away by the sea.