Argelins is a rock system with a multitude of inaccessible cavities where we can see mere juveniles, black crooks, congrios, some scrapie, sometimes benches of barracudas, bent, castanets, charges, imperial longs, weevils, maidens, octopuses, mountaineers, brunettes … This dive has a depth of approximately 16 m. It is advisable to carry a flashlight to see inside the cavities.