User blog comment:Martialmaniac/Indoor Fish, not Conjuration?/@comment-4896558-20160301202846/@comment-5780397-20160301222506

And Greed Island is basically a collective Nen ability... I'm not saying we have to go with Emission at all costs, but since there is an ambiguity, we should at least write "Unknown" (though for sure the fish uses Manipulation to float).