Since May, the Mediterranean coast has received around thirty manta rays (Mobula mobular) that have been stranded on the seashore. Of these, several have arrived on the Balearic Islands coast in recent weeks. In Mallorca alone, they have been located in Santanyí, Arenal, Illetes, and Cala Rajada; two specimens have also appeared in Ibiza, one in Sant Miquel and the other in Sant Josep. Most have died of exhaustion after trying to get stranded, or have had to be euthanized due to their condition. But what is the reason for this, according to experts, extraordinary number?