A kind of fish that's found only in this region. Its body is slimy and covered with a thin membrane. This is probably because it's naturally sensitive to strong sunlight and evolved to protect itself from it.
From the size of its eyes, you can tell that it's visually sensitive. Maybe you could try catching it with a lure that has strong light. I wonder if there's any other necessary factors.
Flower-like lures that emit a soft orange light, which this fish likes, will work.