Some issues about ocean being unrealistic.

I have a few issues with the new tropical fish and the ocean lighting:
Oceans:

• Oceans are too bright at night.
• The corals should generate as seperate structures or sometimes as huge colourful 25x25 patches with lots of little compartments and fish living inside.
  Fishes:
• Fishes are too far away from the corals in general, seeing that most of them live on/inside corals irl.
• Fishes should probably eat seagrass. every once in a while.
• Tropical fishes are mostly prey so they should hide under corals at night
• Fishes like salmon should travel in rivers too like they do irl, and bears eat salmon, so the polar bears can get in on the action.
  Unrelated:
  *Frozen rivers in ocean biomes?