Koi angelfish are a beautiful and popular variety of freshwater angelfish known for their bright, marble-like color patterns that resemble koi fish. They usually have a mix of white, orange, yellow, and black markings, and no two are ever exactly alike. Koi angels belong to the Pterophyllum scalare species and share the same care needs as other angelfish — peaceful most of the time, but a bit territorial, especially during breeding. Here’s what to know if you’re keeping koi angelfish in your aqu