sand grunt
Rhonciscus branickii
Grunt of sandy bottoms of the eastern Pacific, which also enters estuaries. It is sold fresh and is of little importance in sport fishing.
Also called: roncador-arenoso, roncacho arenero, corocoro carruca, sand grunt
- maximum
- 30 cm
who is the sand grunt
The sand grunt belongs to the family Haemulidae, the grunts. It reaches 30 cm, and the common size is 25 cm. It lives in the eastern Pacific, from Mexico to Peru, on sandy bottoms near the coast. It also enters estuaries and lives in brackish water. It has a fusiform body, a shape common to grunts. Commercial fishing catches it on a small scale, and it has little interest for sport fishing.
Essential profile. Identification, where it occurs and rules, with data from FishBase and the cited regulations. Season, time of day, technique and bait are added once we have a good source for the sand grunt; in the meantime, see the similar species.
identification
Fusiform body, a shape common to grunts. It lives on sandy bottoms near the coast and enters estuaries, which helps separate it from reef grunts. It can be confused with Rhencus macracanthus, which also enters estuaries, has a brown or gray back and sometimes shows faint dark bars. It can also be confused with Genyatremus pacifici, which lives on hard bottoms and has transverse stripes on a gray body.
Loading the next 7 days…
Each card shows the day's index (0 to 100) and, below it, a strip with the index for each hour, from 0h to 23h. from poor to excellent.
Essential profile: the index uses a general fish model (weather, sun, moon and tide), without a season or time of day specific to this species.
where found
Occurs in the eastern Pacific, from Mexico to Peru, on coastal sandy bottoms, in estuaries and brackish water.
Habitat: Sandy bottoms near the coast and in estuaries.
rules for the sand grunt
Summary of the regulations we found, with the source for each. Rules change; before keeping or transporting fish, check with the state environmental agency.
We found no species-specific rule beyond the region's general rules.
catch and release
catch and release Releasing the fish alive, quickly and with a wet hand. During a closed season it isn't always allowed: what the regulation says applies.
No danger to anglers. If released, return it to the water carefully.
in the kitchen
Sold fresh in markets.
how much it weighs without taking it out of the water
Length-weight relationship W = a·Lb (a = 0.01413, b = 3.02; FishBase (relação peso-comprimento bayesiana, estimativa da própria espécie)). It's an average: a fat or lean fish can vary by 10% to 20%.
estimated weight
—
sources and references
Essential profile: size, length-weight, depth, countries and conservation come from FishBase and the cited regulations, and the texts were written from those sources. Season, time of day, sensitivities, technique and baits and lures are not included yet, because we did not find a good source for this species.
- scientific FishBase: Rhonciscus branickii (ficha da espécie)Size, length-weight, depth, habitat, distribution, biology, and IUCN status. Page checked on Oct 13, 2026.
- scientific FishBase: nomes populares de Rhonciscus branickiiNames by country and language.
