Club Natació Atlètic-Barceloneta (CNAB) is a Spanish professional water polo club from Barcelona, established in 1913.

The club is located in the coastline neighbourhood of Barceloneta.

Atlètic-Barceloneta is one of the most successful water polo clubs in Spain, having won 23 league titles, 19 national cups and 15 national super cups.

The team has also won the LEN Champions League in 2014.

This article about a water polo team in Spain is a stub.