Minnow shoals are a type of fishing spot found just south of the entrance to the Deep Sea Fishing Hub. They do not require any bait, and have no requirement to fish at besides access to the hub itself, which requires level 68 Fishing.
Minnow shoals may be fished to receive a number of magnetic minnows and 140 Fishing experience. 300 magnetic minnows can then be gutted to create sea turtle, manta ray or great white shark bait, used at the magical fishing spot.
There are only two minnow shoals, and like other fishing spots, they move around every few minutes.