To find more about the sea beasts, I gave Bloodhero the order to send out her best scouts. I also donated more eye flesh samples to Tabletina to create more scouts with "system eyes", although I hated the procedure.
(Every time I felt like THIS might be the time Tabletina's hand slips and I lose my eye. And I had to walk with an eyepatch for the rest of the day every time until the eye could fully heal.)
The ocean was a much harder place to navigate than land, even for astral projections who could fly through it as easily as if it were open sky. Not only was visibility in the water reduced, but the landscape of the sea was absolutely unfamiliar to my people.
They knew how to navigate on land, but the sea had no borders. There were some landmarks on the seabed: massive underwater mountains, giant rock-like creatures, and forests of tall, flexible trees without flowers; they didn't help establish the territories of creatures that mostly lived far above these landmarks.