People are rarely reliable witnesses when they are trying to tell a story. Being an officer of anything doesn't really lend anyone extra credibility either, everyone has their own biases and fantasies. Astronauts have claimed to see aliens and this doesn't make them more credible than a guy on his farm who claims the same thing.
I do think that it's always worth keeping an open mind about the existence of undiscovered creatures, but I don't think it's necessary to latch on to transient sightings to decide that those are the creatures we should look for.
Every time a decaying dead whale washes up on shore, even smart people think it might be something new or undiscovered, because that sounds less banal than the reality, this causes news media to stir up because life is generally boring, and people eat it up for the same reason.
I'll leave the science to the scientists and wait patiently for their new discoveries :)