These two species make a perfectly complementary pair.
Prey can escape from the grouper by hiding in a crevice and from the moray eel by leaving the reef, but prey has nowhere to go if hunted by a combination of these two predators.
The article offers a description and accompanying videos, such as the one showing a grouper and eel swimming side by side as if they are good friends on a stroll.
Electroning tagging of fishes: here.
Cooperation Among Predatory Animals – Biology Part 6: here.
Norway helps endangered eel wriggle from fish nets: here.
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