As far as I know, there is no species of Mackerel that either live or swim up freshwater rivers or streams. They do not naturally live in ponds or lakes. Mackerel, the species in general, are migratory and are on the move all the time. Some may accidentally move too far up stream but they will turn around and head back out to sea.
Mackerel and trout are both fish, but the mackerel lives in saltwater and the trout in freshwater.
a mackerel eating fish
Mackerels are saltwater fish. Tadpoles live in freshwater. Meaning a mackerel wouldn't have much chance of eating tadpoles.
Neither. A mackerel is a fish.
a mackerel eating fish
Yes, mackerel, except for snake mackerels, is a kosher species of fish.
That is the correct spelling of "mackerel" (a type of fish).
I am pretty sure mackerel is a fish since that's the only mackeral I know of.
a mackerel eating fish
Mainly other fish.
Mackerel. Caught one off a piece of mackerel.
A sprat is a small fish and a mackerel is a big fish. It's like copping a plea.