Have the PDA say “Studies show that certain sounds cause fear responses in humans and increase Adrenaline production increasing alertness and concentration.” As an in lore reason as to why boss music plays when you encounter the collector leviathans. please keep the music in as it makes it more annoying to locate it well i mean you know its nearby but you don’t know if its found you. and maybe say that the PDA found that warnings didn’t deter colonists from going near it but music did. Also please keep the deep area between the observatory and the coral gardens and put a new leviathan there or maybe have the elusive leviathan swim through that section of the map.

Maybe there could be some mention about humans having an instinctual fear of gigantic squids, with referencfe to the kraken of earth’s folklore, to create a moment sorta similar to the first time you go to a blood kelp biome and get told this place ticks of multiple primal human fear boxes