Here's what the back looks like with the glow in the dark walls.
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the same view without cables and powered off. two USB ports are visible and several slightly different colour layers of green and blue
the back side with a USB C cable plugged in, the very bottom electronics layer is dark, above is a small layer with colourful LEDs, above that is an opaque blue layer of glow in the dark resin with some decorative reflective seaweed on the walls
the transparent front wall with the axolotl is visible on the left, the main focus is on an opaque back wall which is lit up from below with colourful LEDs