Koi
A variant of Freshwater angelfish (Pterophyllum scalare)
Representative Freshwater angelfishphoto — a dedicated image of this exact morph isn't available yet.
A man-made line blotched orange, white and black, often with a red 'crown' on the head. One of the most popular modern angels, derived from the Gold Marble complex.
Keeper tips for this variant
The orange/red areas intensify with stress hormones and good color foods — strong but non-glaring lighting brings out the koi pattern without washing it out.