Seals are a lot bigger than mackerels. It is far more likely for a seal to eat a mackerel than the other way around.
Mackerels are saltwater fish. Tadpoles live in freshwater. Meaning a mackerel wouldn't have much chance of eating tadpoles.
mackerels are carnivores
A shoal of mackerels
It depends on what type of shark I guess. I know for a fact that guitarfish (aka shovelnose shark) eat Mackerel
Just about every predatory fish in the sea.
There are not many differences between female jack mackerels and male mackerels. However, the female jack mackerels are able to lay eggs and reproduce.
Yellow tail snappers will eat rolled up oats and Yellow tail flounders will eat Crustaceans, amphipods and, polychaete worms
a shark
Mackerel or mackerels
mackerels are carnivores
A shoal of mackerels