We've been recording heat records in the Mediterranean Sea for quite a few years, and 2025 is no exception. Extreme heat has left unprecedented levels in recent months, and this summer the high temperatures caused a new record for sea level rise. Specifically, on August 28, a temporary peak of 40 centimeters above the reference value for the years 1990-1995 was recorded in L'Estartit (Baix Empordà). A record never seen since records began.

Southwest of Pylos, Greece, lies the deepest point in the Mediterranean Sea, in the so-called Calypso Trench. Specifically, 5,267 meters separate the surface from the deepest point. The landscape of an inhospitable desert sunk in the darkness of the sea would be the most predictable scenario, but researcher Miquel Canals' team has confirmed that there is human presence even at the deepest point in the Mediterranean. Remains of garbage bags, cans, and plastic bottles are some of the traces identified by a manned submarine that descended into the trench with the help of pioneering technology.

The heat wave we've been experiencing in recent days has also been felt at sea. The Mediterranean region has been experiencing extreme heat for weeks due to extremely high air temperatures. According to data from the maritime service of the European Copernicus program, at the end of June, seawater temperature anomalies reached up to 5°C above average in some areas. All of this has led to Catalonia has recorded its warmest June on record, with heat records also at sea.

Manta rays are oceanic animals that live in the open sea and in tropical climates and usually measure about 3 meters in wingspan. Although a few years ago it was a very rare phenomenon, More and more giant manta rays are arriving on the Mediterranean coastsThis is baffling marine biologists, who are trying to figure out what these animals are doing in Catalonia, Valencia, and Murcia, and even in other countries, such as Italy and France. Civil Protection sources point out that the lifeguard ordered the swimmers to leave the water.

This Thursday, around two in the afternoon, a fishing boat mistakenly caught a basking shark on the high seas in Port de la Selva. This is one of the largest fish species in the Mediterranean and the second largest in the world. The shark, weighing more than three tons and measuring over seven meters long, became entangled in the boat's trammel nets and eventually died. The fishermen decided to return to the Empordà port, despite the fact that this decision would cost them their catch, their net, and even their fuel. They reached the port, dragging the weight of the shark so that marine professionals could study it.