@dredmorbius @bgcarlisle I've never heard of scandalmonger or goosemonger. Hmm.

Fish (or many other very old animal words) are semi-uncountable. When you say, "I'm going to hunt deer" it's not really equivalent to "I'm going to hunt buttons." They have a collective/uncountable form that's also the same as the singular and the plural and it has to do with originally having been uncountable, IIRC.