Corvina is not high in mercury. The FDA and EPA jointly classify corvina as a “Best Choice” fish, their lowest-mercury category. This means it’s safe to eat two to three servings per week, including for pregnant women and young children.
How Corvina Compares to Other Fish
Corvina lands in a favorable spot when stacked against other popular white fish. While tilapia has very low mercury levels, several fish that look similar on a restaurant menu carry noticeably more. Both snapper and sea bass fall into the “moderately high” mercury range, meaning they contain meaningfully more mercury per serving than corvina. If you’re choosing between these options and mercury is a concern, corvina is the better pick.
The FDA’s three-tier system sorts fish into “Best Choices,” “Good Choices,” and “Choices to Avoid.” Corvina sits in that top tier alongside other low-mercury staples like salmon, sardines, and shrimp. Fish in the “Choices to Avoid” category, like shark, swordfish, and king mackerel, can have mercury concentrations 10 to 20 times higher than fish in the Best Choice group.
Why Corvina Stays Relatively Low
Mercury accumulates in fish through their diet. The general rule: the bigger the predator and the longer it lives, the more mercury builds up in its tissue. Fish that eat other fish (piscivores) tend to carry roughly four times the mercury of fish that feed on insects, plants, or smaller organisms. One study measuring mercury across multiple trophic levels found that non-fish-eating species averaged 0.10 micrograms per gram of mercury in their muscle tissue, while predatory fish averaged 0.44 micrograms per gram.
Corvina is technically a predatory fish, but it’s a relatively small, short-lived one. A freshwater corvina species analyzed in a Brazilian Amazon study measured just 0.14 micrograms per gram of mercury, well below the 0.46 microgram threshold that would push it into a higher-risk category. Larger predators like swordfish and tuna accumulate far more because they live longer, grow bigger, and eat larger prey fish that have already concentrated mercury in their own tissues.
What “Corvina” Actually Means
The name “corvina” applies to several different species in the drum family (Sciaenidae), not a single fish. Gulf corvina (Cynoscion othonopterus) is one of the most commonly referenced, found in the Gulf of California. Other species sold under the corvina label include shortfin corvina and orangemouth corvina, plus various South American freshwater species like Pachyurus junki. The mercury content can vary somewhat between these species depending on their habitat, diet, and size, but none of them are large apex predators, which keeps their mercury levels consistently low across the group.
How Much You Can Safely Eat
The FDA recommends two to three servings of “Best Choice” fish per week for adults, with a standard serving being about four ounces (roughly the size of your palm). For children ages 2 to 11, the recommended portions are smaller, ranging from one to four ounces depending on age, but the frequency stays the same at two to three times per week.
Pregnant and breastfeeding women are often the most cautious about mercury, and corvina is one of the safer options available. It delivers protein and omega-3 fatty acids without the mercury load that comes with higher-tier predators. If you’re already eating other low-mercury fish like salmon or tilapia during the week, adding corvina won’t push you near any concerning threshold. The people who need to be careful are those regularly eating fish from the “Good Choice” or “Choices to Avoid” categories, where one serving per week (or complete avoidance) is the guidance.