The diagonal butterflyfish (Chaetodon fasciatus), also known as the Red Sea raccoon butterflyfish, is a species of butterflyfish (family Chaetodontidae). It is found in the Red Sea only.
They have a yellow body with 11 diagonal stripes and reach a maximum length of 22 cm (c.9 in). In their native habitat, they swim over and around corals, on which they feed. They have also been observed feeding on gelatinous zooplankton, such as jellyfish (Scyphozoa) and comb jellies (Ctenophora).
- Original Name: "Chaetodon fasciatus"
- Country: Poland
- Year: 1967-04-01
- Series: Tropical fishes
- Face value: 40 gr
- Number of catalogue Michel: PL 1750