Robalo-negro
Along the eastern Pacific coast, from the southern Baja California peninsula and Gulf of California south through Colombia and Peru, the Black Snook is the dominant large snook of the region — a silvery, hard-running fish that crosses freely between saltwater, brackish estuaries, and freshwater rivers.
Less familiar to anglers outside its home range than its Atlantic relatives, it can push past a meter in length and is a serious target for local fisheries wherever mangroves meet tidal water.
Scientific Name: Centropomus nigrescens
Also known as Black Snook, Black Robalo, Robalo redondo, Pacific Black Snook
- Silvery, laterally compressed body with a bold black lateral line running from the gill plate all the way to the rear edge of the tail fin — the quickest field mark at a glance.
- Upper head profile is straight and shovel-shaped; the lower jaw protrudes noticeably, and the terminal mouth is wide enough to take large prey whole.
- Fins run dusky overall, with the pectoral and pelvic fins showing touches of yellow; the dorsal profile dips slightly concave just behind the eyes.
- Most adults run 60–80 cm (24–31 inches); the species can exceed a meter, with the largest recorded specimen measuring 123 cm and weighing 26 kg (57 lbs).
What to know
Habitat Distribution
- Native to the eastern tropical Pacific — from the southern Baja California peninsula and the Gulf of California south along the coast to Colombia and Peru.
- A euryhaline species that moves across marine, brackish, and freshwater environments depending on life stage and season; adults have been recorded in coastal lagoons, estuaries, and freshwater rivers well inland.
- Mangrove systems are the core habitat — adults concentrate in mangrove-fringed lagoons and estuaries, and are also found in rustic ponds connected to coastal drainages.
Specific Spots
- Mangrove root tangles and undercut banks draw fish in because the roots concentrate baitfish and crustaceans in tight quarters — work presentations right against the structure, not near it.
- Lagoon channels and estuary mouths where tidal current funnels through a narrow opening; fish hold at the current edge to intercept prey moving with the tide rather than burning energy chasing it.
- Shaded margins of brackish ponds and river backwaters, where slower water sits adjacent to a current seam — the fish can rest in the slack while remaining within easy reach of drifting forage.
Robalo-negro FAQ
Answers from onWater's species guide.
What are the best lures and bait for Robalo-negro?
Live baitfish and live or fresh shrimp are the most consistent producers in estuarine and mangrove settings, present them near structure on a light jighead or free-lined under a float.
What do Robalo-negro eat?
Smaller fish and crustaceans make up the core of the diet, the same forage base that drives snook fishing across the family. Live or cut baitfish and shrimp are the most direct match for what this fish is already eating.
Where do Robalo-negro live?
Native to the eastern tropical Pacific, from the southern Baja California peninsula and the Gulf of California south along the coast to Colombia and Peru.
See it in the app
Most maps show you water.
onWater shows you Robalo-negro.
- 01 · Species map filter
Map every Robalo-negro water
Pick Robalo-negro and the map zeroes in on the waters they call home. No more guessing which lake holds them.
- 02 · Waterbody species
Tap any water. See what lives there.
Species, behavior and seasonal patterns for every lake, river and pond, before you leave the driveway.
- 03 · Angler Intelligence
Ask how to catch Robalo-negro
Tactics, gear and timing from onWater's AI fishing guide, tuned to the species and the water you're on.
Stop guessing where Robalo-negro are.
Open the map, filter by Robalo-negro, and head to water that holds them. Download onWater and plan your next trip in minutes.
- Species map filter
- Angler Intelligence
- Fishing journal
Explore other species
Trout, bass, salmon, panfish and everything in between. Each guide unpacks the behavior, seasons, and tactics that put fish in the net.
No species information available.
Smarter Fishing Starts in the App.
onWater Fish gives you everything you need to plan smarter, fish better, and own every trip from first cast to last.