Bigeye Scad Sardine Identification Guide
Recognize the bigeye scad by its oversized eyes, silvery elongated body, and keeled scutes near the tail.
Read the full Bigeye Scad Sardine encyclopedia entry →
Key identification features
- Elongated, moderately compressed, silvery body with a faint yellow stripe along the sides
- Notably large eyes for its body size, giving the head a big-eyed look
- Two separate dorsal fins along the back
- Row of enlarged, keeled scutes along the rear portion of the lateral line, near the forked tail
- Adipose eyelid partially covering the eye; typically 15-25 cm (6-10 in)
Common look-alikes
- Sardines and herrings: lack the enlarged eye and the hard, keeled scutes near the tail that mark this species as a scad rather than a true herring
- Yellowstripe scad: similar shape but has a bolder, more continuous yellow stripe and a proportionally smaller eye
- Round scad: deeper body and a shorter snout compared with the bigeye scad's more pointed head
Where you'll see one
Bigeye scad form large, tight schools over reefs, sandy flats, and open coastal waters throughout tropical and subtropical seas worldwide, often near the surface by day and dispersing to feed at night.
Frequently asked questions
How do I tell a bigeye scad from a true sardine?
Look for the noticeably large eye and the row of hard, keeled scutes along the rear lateral line; true sardines lack both.
How can I distinguish it from a yellowstripe scad?
The bigeye scad has a fainter, less continuous yellow stripe and a proportionally larger eye than the yellowstripe scad.