Saddleback Butterflyfish Identification Guide
Learn to spot the Saddleback Butterflyfish by its huge yellow-rimmed black saddle patch and deep, disc-shaped body.
Read the full Saddleback Butterflyfish encyclopedia entry →
Key identification features
- Deep, laterally compressed, oval-shaped body reaching up to 30 cm, among the largest butterflyfish
- Pale gray to bluish-white body with faint diagonal scale lines
- Massive black saddle patch outlined in yellow-white draped over the upper back and dorsal fin base
- Diagonal black stripe angling through the eye, unlike a simple vertical bar
- Orange wash around the mouth and on the pelvic fins
- Adults trail a short filament from the soft dorsal fin
Common look-alikes
- Mirror Butterflyfish (Chaetodon speculum): has a small round yellow-orange spot centered on the flank rather than a large saddle draped over the back.
- Vagabond Butterflyfish (Chaetodon vagabundus): shows chevron-patterned stripes and two dark bars near the tail, with no saddle marking at all.
- Latticed Butterflyfish (Chaetodon rafflesii): finely checkered body pattern without any large dark saddle.
Where you'll see one
Saddleback Butterflyfish inhabit coral-rich lagoons, reef flats, and outer reef slopes across the tropical Indo-Pacific, usually alone or in pairs, foraging over hard and soft coral for polyps and invertebrates.
Frequently asked questions
How do I tell a Saddleback Butterflyfish from a Mirror Butterflyfish?
Look at the dark marking's shape and size: the Saddleback carries a large yellow-edged black saddle draped over the whole upper back, while the Mirror Butterflyfish has only a small round orange-yellow spot centered on the flank.
What is the single best field mark for this species?
The oversized black saddle patch trimmed in yellow-white sitting high on the back near the dorsal fin is unmistakable and not matched by any other common butterflyfish.