The problem is that no one even knows this phenomena exists and then have no place to go with their data. The map pretty well confirms a real lack of resolution. We really need to get those hundreds of missing reports.
I do think that this creature spends plenty of time underwater fishing at night. Thus it should by active around wetlands, lakes and swamps or where fish are readily availablie.
In the event, the phenomena now has ample confirmation sightings to fully establish its presence.