The Meagre (known as the Shadefish in the European series) is a large fish that only appears in Endless Ocean: Blue World.
"This large, dull silver fish can make drumming noises by beating an air chamber inside its body, and also croaks like a frog. Large numbers of them gather in the shallows in their breeding season."
They are found in loose, slow-moving groups. Their movements are not coordinated and there are not very many of them in each group.
These fish respond positively to being fed.