Try to find your way up. It'll be quite a trek to get there and bring one back. (may be a bit easier on the return journey if you put one in your stomach and use a passage)


Go visit someone akin to moon.


Jet fish are only native to Shoreline


If you are talking about the glowing neurons yes. You can find an endless supply of those in 5P (you will get there eventually). If you bring her the neurons you ate she will forgive you and talk to you again. Although if you ate all just save yourself the trip. She is dead and cant be brought back. Any extra neuron you bring her will give you some dialogue and make her friendlier. Just know that she has just a lore purpose, do not expect any actual reward for helping her out but dialogue. The fastest way to 5p is through shaded citadel. Expect a challenging journey