A jack, not a tuna.
Southern California field dossier
Yellowtail
Seriola dorsalis
- California yellowtail
- mossback
- yellowtail jack
A powerful eastern Pacific jack that shifts between nearshore structure and offshore water. Read the yellow tail, the clean dark-over-light body, and the day-feeding pattern before choosing a plan.
Sources reviewed 2026-07-287 source records
Photo coverage stateVerified photograph pending rights review. No third-party image is embedded in this beta dossier.
- Forked yellow tailThe caudal fin is the fastest field mark.
- Dark above, pale belowStrong countershading with a clear color boundary.
- Smooth tail baseThe caudal peduncle lacks the scutes seen on many other jacks.
Verify current regulations before every tripSnapshot checked 2026-07-28. Follow the official links below for live rules, protected areas, licenses, and any in-season changes.
At a glance
Every factual card carries provenance
Historically found near kelp in spring and fall and farther offshore in summer when locally available.
Sardines, anchovies, jack mackerel, Pacific mackerel, and squid were documented in Southern California stomach samples.
Open year-round in the July 1, 2026 Southern Region summary, with species-specific size and bag rules.
Field dossier
Beginner-readable, source-deep
Read the silhouette first
Identification & look-alikes
Look for a streamlined jack with a deeply forked yellow tail, a dark blue back, a pale underside, and a clear boundary between the two body colors.
California's current species portal lists yellowtail as Seriola dorsalis. It is a jack and is separate from yellowtail rockfish and the tuna species.
Common names overlap across unrelated fishes. Use the whole feature set and the current CDFW identification resources, not the word “yellowtail” alone.
Context, not a promise
Typical size
CDFW's 2001 profile reported that Southern California and Coronado Islands sport anglers generally landed fish from 4 to 12 pounds. Treat that as historical context, not a current size forecast.
The same CDFW profile reported average sizes near 20 inches at age one, 28 inches at age three, and 44 inches at age ten, with substantial variation by year and area.
What the fish is built to chase
Diet & prey
Mobile and opportunistic
Behavior
Structure sometimes, open water often
Habitat, structure, depth & range
CDFW reports a range from British Columbia to Mazatlán, including the Gulf of California.
The California fishery has historically operated in nearshore water beside kelp beds, while summer fish may also hold offshore around floating kelp.
The official California source set does not support one dependable fishing depth. The dossier therefore reports structure and seasonal position instead of a false depth target.
- Coverage note
- CDFW
A tendency, never a guarantee
Seasonal pattern & water
CDFW's historical profile places available fish nearer shore in spring and fall and farther offshore in summer.
Historical CDFW catch records linked stronger Southern California availability to warmer water off northern Baja and lower catches to cool periods. This is a long-term association, not a live bite threshold.
Match behavior before color
When & how they feed
Start simple and land fish cleanly
Techniques, tackle & beginner setup
California's yellowtail fishery is a hook-and-line fishery; CDFW also permits chumming with live bait under the general ocean regulations.
A sardine, anchovy, mackerel, or squid presentation follows the prey documented by CDFW. Ask the boat crew which legal rig matches the day's bait and conditions.
Use tackle strong enough to land the fish promptly, especially if you may release it.
Keep only what you intend to use
Handling & conservation
Use tackle strong enough to land the fish without an exhausting fight, and keep a dehooker or suitable release tool ready.
If releasing, dehook in the water when possible. Never gaff a fish you plan to release, keep air exposure brief, wet your hands, avoid eyes and gills, and support the body rather than hanging the fish by its mouth.
Face a sluggish fish into the current until it can swim away under its own power.
Snapshot checked 2026-07-28
California regulations
CDFW's Southern Region summary, updated July 1, 2026, lists the yellowtail fishery as open year-round with a 10-fish daily bag and possession limit. The minimum is 24 inches fork length, except up to five fish under 24 inches may be taken or possessed.
Yellowtail use fork length in the species rule. Review CDFW's measurement guide before leaving the dock.
Boat limits, fillet rules, licenses, closed areas, marine protected areas, and temporary actions can also apply.
From species to a trip plan
No inferred targeting
Recent verified countsOpen the live count view. Missing source reports remain labeled, never converted to zero.
Live source states →Open tripsBrowse verified schedule inventory. Current beta inventory does not claim that a trip targets this species.
Targeting not yet verified →Landing sourcesInspect official count and schedule sources by Southern California landing.
Source directory →Boats reporting tripsSee boats present in verified schedule feeds. Species targeting is shown only when a source proves it.
Honest coverage →Citation & provenance ledger
7 sources used in this dossier
- California Marine Species PortalCalifornia Department of Fish and WildlifeCurrent California common names, scientific names, and species aliases. Reviewed 2026-07-28.
- Seriola dorsalis species recordFishBaseAuthoritative species database used only for stable morphology and broad ecology where the current CDFW portal does not expose equivalent text. Reviewed 2026-07-28.
- California's Marine Living Resources: YellowtailCalifornia Department of Fish and WildlifeCDFW biological and fishery profile published in 2001. Historical observations are labeled as such in the guide. Reviewed 2026-07-28.
- Southern Region ocean regulationsCalifornia Department of Fish and WildlifeOfficial current Southern Region season, size, bag, and possession summary. The page states it was updated July 1, 2026. Reviewed 2026-07-28.
- Ocean Sport Fishing hubCalifornia Department of Fish and WildlifeOfficial entry point for licenses, identification, current regulations, marine protected areas, advisories, and release guidance. Reviewed 2026-07-28.
- General ocean fishing regulationsCalifornia Department of Fish and WildlifeOfficial general limits, boat limits, gear rules, and fillet requirements. The page states it was updated July 24, 2026. Reviewed 2026-07-28.
- Catch and release fishing best practicesNOAA FisheriesOfficial handling and release guidance. NOAA states the page was updated September 3, 2025. Reviewed 2026-07-28.
Continue learning
Return to the guide for another dossier, or open the normalized count profile for the same species name.