Two characteristic archipelagos are reproduced at either end: at the eastern end, an underwater view of the island of El Hierro in the Canary Islands, and at the western end the seabed of Bermuda.
Between the two towers a 30-metre tunnel runs through the aquarium, allowing full underwater viewing of many typical species found in the open sea, including several species of sharks and rays, and large ocean fish.
But, undoubtedly, the most spectacular animals in the aquarium are the sharks and rays, cartilaginous fish with unique characteristics that differentiate them from other bony fish. The aquarium allows you to closely observe the morphological characteristics and behaviour of the different species.
The 7 most representative species of the aquarium are Sand tiger shark (Carcharias taurus), Sandbar shark (Carcharhinus plumbeus), Bull ray (Pteromylaeus bovinus), Eagle ray (Myliobatis aquila), Sawfish (Pristis sp), Smooth-hound (Mustelus mustelus), Sunfish (Mola mola).
Also there are 7 Sand tiger sharks, 1 male and 6 females, which the aquarists can distinguish thanks to specific marks or features. The biggest female is Africa, with a weight of 200 kg. and 302cm long. It also has 2 marks on the left pectoral fin.Regarding the rest of females, Amparo has a mark on the right pectoral fin. Sara has a very pronounced dorsal curvature and some small bumps on the base of the left pectoral fin. Sabrina has some marks on the base of the left pectoral fin. Finally, the smallest one of all is Melisa.
Various fish have been born in the Oceans tank, including 10 Smooth-hounds and 6 Eagle rays. Another curiosity is that groupers accompany divers and play with the bubbles from their regulators. Also the benthic animals (which are distributed near the bottom), including the smooth-hounds, are trained from childhood to eat from divers' hands in specific areas of the aquarium.
All aquarists in the Oceans facility know how to identify each of the 80 elasmobranchs that live in the tank, so as to be able to control their diet and health.