Length–weight relations (LWR) were estimated for 45 fish species (27 families) from a tropical hyperhaline coastal lagoon and a protected biosphere reserve located in Yucatan Peninsula. The following species were studied: Elops saurus Linnaeus. 1766; Anchoa mitchilli (Valenciennes. 1848); Harengula jaguana Poey. https://www.markymarkscott.com/product-category/5rs/