Longtooth Grouper Identification Guide
Spot the protruding canine teeth and mottled olive-brown body that identify this northwest Pacific grouper.
Read the full Longtooth Grouper encyclopedia entry →
Key identification features
- Robust, elongated grouper body, olive-brown to grayish overall with faint darker mottling and no strong bars or bold blotches
- Enlarged canine teeth that protrude visibly from the front of the lower jaw even with the mouth closed, the clearest field mark for this species
- Large head with a slightly concave profile above the eyes and a fairly heavy build overall
- Grows to over 3 ft (90+ cm), among the larger rocky-reef groupers in its range, with a thick, powerful caudal peduncle
Common look-alikes
- Malabar grouper — larger overall with a coarser blotchy pattern and no obviously protruding teeth
- Seven-band grouper — shows bold pale vertical bands on a gray body, unlike longtooth grouper's uniform mottled pattern
Where you'll see one
Longtooth grouper occupies rocky reefs and boulder habitat in cool-temperate to subtropical waters of the northwest Pacific, including Japan, Korea, and China, from shallow shorelines to moderate depths, often near crevices and drop-offs where it can ambush passing prey.
Frequently asked questions
What is the defining feature of longtooth grouper?
The enlarged canine teeth that protrude noticeably from the lower jaw even with the mouth closed are the clearest way to separate it from similarly colored groupers.
How do I tell longtooth grouper from seven-band grouper?
Seven-band grouper shows bold pale vertical bands on a gray body, while longtooth grouper has a more uniform mottled olive-brown pattern without distinct bands.