This also reminds me of the quote: "Talk to aliens? We can't even talk to whales!"
"Build on substantial data on the whales’ sounds, social lives, and behavior already obtained by the Dominica Sperm Whale Project. Create a bespoke, big data pipeline to examine the recorded data and decode it using advanced machine learning, natural language processing and data science."
Zero shot classification without any examples? OK. Having "Behaviour" information to link to sounds? OK. But using "data science" and especially using NLP to decode whale sound? Sorry you have to be more specific, otherwise this sounds just like any other buzzword bingo.
Being more quiet or harder to detect would be noticed by intelligent creatures, nevermind the survival pressures.
Perhaps they are using obfuscation as primitive encryption techniques to keep messages hidden to foes and understood by friends.