(Note: Enter this exactly as shown, usually lowercase works best depending on the specific version).
Datamining forums (e.g., Steam Community, r/maneater) revealed that the hint word is sometimes – a jealous shark that takes the top spot. "Usurper" is a perfect synonym for a jealous competitor at the top of the food chain. sharks lagoon jealousy hint word top
In your case, the hint word might be (see below). (Note: Enter this exactly as shown, usually lowercase