Fish Apartments

I can't get into the Fish Apartments.
How do I help Narcissus, the Blowfish?
How do I help Epidermis, the Angelfish?
How do I help Hippocrates, the Swordfish?
How do I help Erroneous, the Sea Turtle?
How do I help Gregarious, the Manatee?
How do I help Olympia, the Lionfish?

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