Plans to save European eels and red tuna have been adopted by EU Fisheries and Agriculture Ministers in Luxembourg.
Both species have been fished almost to extinction, according to the latest surveys.
A project to boost the eel population has been on the table for nearly two years but France and Spain, the principal countries for eel fishing in the EU, delayed its adoption.
Eel numbers are down more than 95 percent since 1980.
Measures will include quota limits on the fishing of both adult and baby eels. A percentage of young eels captured will also have to be put back into European waterways.
France and Spain have been exporting baby eels to Asia where they fetch more than 1000 Euros a kilo.
Red tuna is also a valuable and much sought after commodity struggling to survive.
EU measures to save the species form part of a worldwide 15-year effort.
The annual red tuna quota will be lowered by 10 percent. Any tuna weighing less than 30 kilograms will have to be thrown back, as opposed to the ten kilogram limit at present.