Whale shark, the biggest living species of fish, may use volcanic islands off the western coast of Europe as a new home. Since, the sea surface temperature continues to rise, the whale sharks are moving in search of foods. In recent times, fishermen have spotted the large whale sharks around the Azores islands.

It is the climate change that makes whale sharks move to waters with right temperature. Alike, white sharks, whale sharks are gentle giants. They use rows of teeth as filter to take out small creatures for meals in the flowing water.

The whale shark is known to reach up to 41.5 feet in length and 47,000 pounds in weight. A marine and fisheries ecologist, Pedro Afonso, said, "Whale sharks are the largest living fish, yet they are also very elusive".

In the warm year of 2008, researchers found a quick rise in whale shark sightings. And after a period of time, the giant fish became everyday visitor to the area. Mainly, shark gives preference to warm tropical waters (79-86 degrees Fahrenheit).

The scientists collected data on whale shark sightings to have a fair idea about why these gargantuan fish show up in the region of the Azores. This data was gathered from 1998-2013 by observers on tuna fishing boats. By searching for whale sharks, the fishermen managed to discover tuna.

The high increase in the Azores temperature is interconnected with high amount of chlorophyll, which is a kind of whale shark food.