Spain is mainly the responsible for that: ~30kg per capita/year (vs. <10kg in other European countries).
If we ignore Portugal (and Iceland which consumes a lot more per capita but is not in the EU), Spain is indeed the top consumer per capita in the European Union, but nowhere near 3x most European countries.
Only 50% more than France/Italy and about twice of UK/Belgium/Finland/Denmark/Netherlands.
Unless by "other European countries" you meant to refer to Germany, the ratio is way off.
http://www.eumofa.eu/documents/20178/108446/The+EU+fish+mark...