Using the scale method, age and growth characteristics of 1481 surfperches comprising three species (Cymatogaster aggregata, Hyperprosopon argenteum, and Phanerodon furcatus) were studied. They were collected from North Humboldt Bay from September, 1967, to December, 1968. There were few differences in length-weight relationships among species and between sexes; those which emerged between sexes may have been due to the sampling schedule. The linear relationships between body length and scale radius in all three species yielded high correlation coefficients. The shiner perch grew considerably less than the walleye surfperch and white seaperch; the last two had similar growth histories. Females of each species were generally longer than males, but most of this advantage was gained by the end of the second year of life.