@Hikari You notice the fish movements, and also notice something else peculiar about these particular fish - they seem to move just a little... off? You can't put your finger on it but they almost seem a little too aware. Fish aren't really known for having high IQs so the fact that they're deliberately seeming to notice your presence and react to you is weird.
One of the visitors you saw by the entrance, an older grey-haired fellow with a flat cap, wanders to a fish tank close by and starts peering closely at the fish. He taps a finger on the tank and a fish darts away.
As the magic allows you to understand Bubblespeak, you suddenly hear the African cichlids in front of Seline chittering quietly in high-pitched voices: "She is bright? She so bright! Very bright! Must follow! Pretty!"
It's harder to hear from further away, but distant Bubblespeak is saying things like "Food? Yum? You bring food?" and a deeper bubbling that might be from the turtles: "Duuuuudddeeeee."
"If only life could always be as simple as following a current," he says, moving over to look at some tetra fish. "Imagine how peaceful their lives must be."
It's hard to conceal because it's verbal and somatic, so you'd be making lots of gestures and muttering. You could definitely try but it'd be a high Stealth roll.
And I meant to say this earlier but this is a collaborative story, if you ever want to just straight up improvise something like "hey remember that time we went to the (insert water-related place) and did (very relevant thing)" I'm just gonna roll with it and incorporate it, I'm basically never going to say "no that didn't happen." So don't feel like you always have to stick by my Planned Locations or anything, I'll always throw out ideas but you can make up your own.
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Like if there hadn't been an aquarium and you had said "hey how about we go to the aquarium that totally exists" i'd be like "hell yeah there's an aquarium now"
I always have random NPCs, items and critters that can be dropped into basically anywhere so don't be afraid to just bullshit locations into existence :p
(chose Stealth and Arcana for new Expertise since that's what she's been using so it makes narrative sense to improve)
I'm getting a larger power boost than I should since I realized I forgot to update my modifiers for Proficient skills when my proficiency bonus went up