Honestly I'm questioning the quality of this website. Seems like it's largely one guy writing low-effort clickbait science articles, likely to raise public awareness of the Northrop Grumman brand and some of their focuses - space, sea, STEM, automation, cyber security, etc.
https://now.northropgrumman.com/aliens-in-the-ocean-is-sea-i...
https://now.northropgrumman.com/proof-of-mermaids-science-te...