Larval descriptions of Anchoa compressa and A. delicatissima are based upon laboratory-reared specimens and larvae collected from Newport Bay, California. Eggs ofengraulid species indigenous to the southern California Bight are pelagic, lack an oil globule and have a segmented
yolk. Anchoa compressa eggs are nearly spherical and average 0.80 mm in diameter. Eggs of A. delicatissima and Engraulis mordax are ellipsoid; major axis averages 0.94 mm and 1.33 mm respectively; minor axis averages 0.57 mm and 0.66 mm respectively. Newly hatched Anchoa
larvae are unpigmented and relatively undifferentiated. Preanal lengths of larvae less than 10 mm range from 68 to 70% SL and progressively decline to values less than 63% SL in post-flexion larvae. Median fin ontogeny commences with the dorsal fin at 3.7 mm followed by the anal fin at 4.5
mm and caudal fin at 5.1 mm. Pigmentation is primarily restricted to a paired melanophore row located ventrally on the intestine. Anchoa larvae are distinguished from E. mordax by lower preanal myomere counts (20–26 vs. 26–31), greater dorsal-anal fin overlap lengths,
higher anal fin ray counts and dorsolateral gut pigmentation located near the anus.
The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.