In plural form of FISH what do you say fish are or fish is?

The noun 'fish' as a food substance is a singular uncountable noun, or a single creature.Examples:This fish is delicious.

That fish is getting away.

The plural noun 'fishes' is a Word for two or more creatures or two or more types of fish. Examples:

The fishes in the pond are goldfish.

The fishes on the menu are tuna, salmon, and cod.

However, it is accepted to use the singular noun 'fish' for both singular and plural. Examples:

That fish is getting away.

Those fish are guppies.