This photograph shows a blue crab (Callinectes sapidus) in a bin near the Mediterranean sea in Hyeres, southeastern France on May 28, 2026. (Photo by MIGUEL MEDINA / AFP via Getty Images)

A blue crab (Callinectes sapidus) eats clams in an aquarium at the laboratory of the Mediterranean Institute of Oceanography (MIO) in Marseille, southeastern France, on May 28, 2026. (Photo by MIGUEL MEDINA / AFP via Getty Images)

A biologist mesures a blue crab (Callinectes sapidus) at the laboratory of the Mediterranean Institute of Oceanography (MIO) in Marseille, southeastern France, on May 28, 2026. (Photo by MIGUEL MEDINA / AFP via Getty Images)

A biologist mesures a blue crab (Callinectes sapidus) at the laboratory of the Mediterranean Institute of Oceanography (MIO) in Marseille, southeastern France, on May 28, 2026. (Photo by MIGUEL MEDINA / AFP via Getty Images)

A biologist examines a blue crab (Callinectes sapidus) at the laboratory of the Mediterranean Institute of Oceanography (MIO) in Marseille, southeastern France, on May 28, 2026. (Photo by MIGUEL MEDINA / AFP via Getty Images)

A biologist weighs a blue crab (Callinectes sapidus) at the laboratory of the Mediterranean Institute of Oceanography (MIO) in Marseille, southeastern France, on May 28, 2026. (Photo by MIGUEL MEDINA / AFP via Getty Images)

A biologist shows the genitals of a blue crab (Callinectes sapidus) at the laboratory of the Mediterranean Institute of Oceanography (MIO) in Marseille, southeastern France, on May 28, 2026. (Photo by MIGUEL MEDINA / AFP via Getty Images)

A pharmacy sign displays the outdoor temperature, reading 33 degrees celcius, as a record-breaking early heatwave scorches a swathe of western Europe, in Paris, on May 29, 2026. The UK and France have reported their hottest ever May days this week as a "heat dome" brought sizzling temperatures more typical of midsummer to western Europe. UN climate chief Simon Stiell said the heatwave was "a brutal reminder of the spiraling impacts of the climate crisis. "The science is clear that human-induced climate change is making these heatwaves more frequent and extreme," Stiell add in a statement. (Photo by SIMON WOHLFAHRT / AFP via Getty Images)