The Arctic Metagaz went down between Libya and Malta after it was hit by explosions and a fire, Libyan officials say.
Overfishing and illegal fishing are contributing to the loss of sharks, including great whites.
More than 700 have died crossing the central Mediterranean in 2025, according to the UN reugee agency.
Sea temperatures around places like Majorca exceeded 30C earlier this month, far above average.
The vessel is travelling to multiple locations, including the Middle East, over eight months.
Thirty-two people were shipwrecked on a rig in the Mediterranean with no food or water, an NGO has said.
Animal rights campaigners and marine zoo official say Mediterranean is 'too warm' for killer whales.
Ursa Major ran into trouble in the Mediterranean between Spain and Algeria, with two crew still missing.
A charity boss says the Mediterranean is "littered with bodies" as deaths leave students angry.
