Species
Kyphosidae
Opaleye
Field guide · §4.12

Opaleye

Girella nigricans
Kyphosidae (sea chubs / rudderfishes)
Water
58-68°F
Best time
Diurnal
Tide
Incoming
Robert's pick

How to catch a opaleye

Bait
Fava bean (the classic), frozen pea, moss, sea-grass. Mussel as backup.
Rig
Small bobber/float with #8 baitholder hook, 10 lb mono, 18" leader
Technique
Sight-fishing — chum a little moss to draw them in, then drop the bait.
When they bite
Tide preference
Incoming, slack-high (algae grazing on newly submerged rocks)
Time of day
Diurnal, mid-day peak
Pressure
Any
Sources
  • · Pier Fishing in California Opaleye chapter
  • · Allen & Pondella (2006)
Full citations in SPECIES-EVIDENCE.md §4.12.
← All species·§4.12 in SPECIES-EVIDENCE.md

Opaleye

Girella nigricans
Kyphosidae (sea chubs / rudderfishes)Prefers 5868°F
Habitat & range

Where they live

CA range
Cabo San Lucas → San Francisco
Habitat types
Rocky reef + kelpJetty into sandTide pools / boiler kelpCobble/mixed surf
Water temp
5868°F preferred
Life history

Biology

Lifespan~10 years
SpawningApril–June. Larvae are pelagic for several months.
SchoolingSmall groups of 3–10 fish
DietAlgae (predominantly — distinguishes opaleye from most other reef fish), small crustaceans, polychaete worms
Behavior

When they bite

Tide preferenceIncoming, slack-high (algae grazing on newly submerged rocks)
Time of dayDiurnal, mid-day peak
Pressure biasAny
Field ID

How to identify

Dark olive-gray, oval body, distinctive opal-blue eye (the name), white tail-base spots in juveniles

Look-alikes

Halfmoon (similar shape, lighter blue-gray, smaller eye); Pile Perch (deeper body, different fin shape)

Robert's pick

How to catch

Best baitFava bean (the classic), frozen pea, moss, sea-grass. Mussel as backup.
Best rigSmall bobber/float with #8 baitholder hook, 10 lb mono, 18" leader
TechniqueSight-fishing — chum a little moss to draw them in, then drop the bait.
California regulations
No size or bag limit specifically (general regulations apply)

Always verify current regulations on the CDFW site.

Did you know

Opaleye are one of the few reef fish that primarily eat algae — they're essentially marine herbivores. The 'fava bean bait' trick exploits their vegetarian diet.

Sources
  • · Pier Fishing in California Opaleye chapter
  • · Allen & Pondella (2006)
Full citations + cross-references in SPECIES-EVIDENCE.md §4.12.