first two annuli by examining the fins from juvenile fish. This measurement can then be used to estimate the position of the third annulus on older fish. Gallery ReferencesThis article incorporates material from Fisheries and Oceans Canada. This reproduction was not done in affiliation with or with the endorsement of Fisheries and Oceans Canada.External links Lingcod NOAA FishWatch''. Retrieved 5 November 2012. Hexagrammidae Western North American coastal fauna Fauna of the San Francisco Bay Area Fish described in 1854