Of the 79 species of cetaceans existing in the entire world, 19 of them have been seen in the waters of Tenerife, where there is a stable colony of pilot whales (Globicephala macrorhynchus) made up of approximately 250 members. These animals, which are sociable and quite used to human presence, are concentrated in the narrow strait that separates the southern coast of Tenerife from the neighboring island of La Gomera, and their sighting is possible at any time of the year.

The Canary Islands are located in the waters of the subtropical West African region and of volcanic origin (which implies great water depths not very far off the coast). They present some unique oceanographic and geomorphological characteristics that allow for the existence of topical-water wildlife alongside fauna more inherent to be found in temperate and cold waters. The islands mark the southern boundary for cold-water species and the northern limit for species of tropical waters. At present, at least 29 species of cetaceans belonging to 8 families have been identified, although there have been sightings that have not yet been confirmed of three other species. This set of species makes the Islands one of the places in the world with the greatest diversity in terms of cetaceans, and the largest cetacean zone in Europe.

The reason why we can find these stable colonies of cetaceans in our waters throughout the year is especially due to three factors:

Calm waters, an average water temperature that ranges between 18 and 20 degrees Celsius and a water depth which averages 1,500 meters between the islands of Tenerife and La Gomera and whose maximum depth is approximately 2,400 meters.

All of these factors make these waters very rich in organic matter, fish, and -especially- squid and other cephalopods, also being able to find specimens of giant squid, which is the favourite food of the sperm whale (Physeter macrocephalus). The abundance of food, combined with the factors previously described, allows pilot whales (Globicephala macrorhynchus) and bottlenose dolphins (Tursiops truncatus) to live in our waters throughout the year, and for many years. In addition to these two species, which are commonly seen in these waters, we can also find some of the following specimens with a good amount of frequency:

The sperm whale (Physeter macrocephalus); the false killer whale (Pseudorca crassidens); the tropical whale (Balaenoptera edeni); the common dolphin (Delphinus delphis), smaller than the bottlenose dolphin; the striped dolphin (Stenella corevalba), very easy to recognize because of its beautiful, dark, longitudinal lines; the rough-toothed dolphin (Steno bredanensis); Risso's dolphin (Grampus grislus); the bottlenose dolphin (Tursiops truncatus); the spotted dolphin (Stenella frontalis), of a size similar to the common dolphin but with a colour similar to the bottlenose when it is young. And, on some occasions, the blue whale (Balaenoptera musculus), the beaked whale (various species), and the killer whale (Orcinus orca) - up to a total of 26 species.