In a bay in near Napoli and the Campi Flegrei Volcano the sea has turned red presumably from an algal bloom to an extent the locals have not seen than has them worried about volcanic activity.

Only occurring in a lake in the area, this is is also likely to be caused by rising warm water and/or outgassing of CO2.

If this is the case its the second report into outgassing from the oceans, the last I ran was from the Southern Ocean, was CO2 and detected by the University of Goteborg.

If algal blooms are also occurring in pockets along with the other materials entering the seawater this could also be linked to the many marine deaths we have seen in Whales and Sharks.

This could also affect other animals via toxicity or lack of oxygen which would likely be why many birds, and sea-birds, have been dying.

It is also entirely plausible that said toxins could affect the brain and throw off their navigation skills, which could also still be a changing magnetic field or compounding the issue?

I solved a climate puzzle for Calabria, just south of Italy, in 2001 so this would turn out to be very weird if this ended up addling to what I discovered

https://initalia.virgilio.it/campi-flegrei-baia-mare-diventa-rosso-58855