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Reproductive biology and larval development of the Florida blenny, Chasmodes saburrae, are described and figured; notes on life history are given. Adults spawn in the field from early March until early November with peak spawning in April/May and September. Nests, most often found in oyster shells, contain about 120 eggs/cm2• Eggs average 0.82 mm diameter and hatch in six days at 27° C. Larvae are planktonic and 3.2-3. 7 mm SLat hatching. Laboratory-reared larvae settle to the bottom in 21 days. The skeleton develops throughout larval and early juvenile stages. Adult lateral ethmoids are probably the result of fusion between two ossifications. The maxillae and premaxillae are partially resorbed during development. Some larval teeth are resorbed, while others transform into adult-type teeth. The ural centrum fuses with the dorsal and ventral hypural plates as they ossify. While hypurals 1-4 are difficult to distinguish during development, hypural 5 is nearly separate as cartilage before it fuses with the hypural plate. The Florida blenny, Chasmodes saburrae (Jordan and Gilbert, 1883), is a small, benthic fish inhabiting shallow coastal waters of Florida. Previous studies of C. saburrae were systematic or ecological in nature and contributed little information on their reproductive biology (Reid, 1954; Springer, 1959; Springer and Woodburn, 1960; Carr and Adams, 1973; Williams, 1979). The genus Chasmodes Valenciennes contains two species, C. bosquianus (Lacepede) and c. saburrae. Hildebrand and Cable (1938) reported on the embryology and newly-hatched larvae of C. bosquianus, which lay adhesive eggs in a single layer within oyster shells that are guarded by the male parent until hatching. Larvae are planktonic before settling to a benthic existence. Although the osteology of the family Blenniidae has been examined, little is known of their developmental osteology. Springer (1968) studied blenniid osteology and presented a detailed analysis of the generalized blenniid Entomacrodus nigricans Gill. Forty-one other blenniid genera, including C. bosquianus from the genus Chasmodes, where examined and 79 discussed when notably different from E. nigricans or when establishing evolutionary trends within the Blenniidae. Fishelson (1963) used stain to examine ossification in larval 8/ennius pavo Risso, but the developmental osteology of the larvae was not detailed. This study was designed to gather quantitative information on the reproductive biology of C. saburrae and to obtain a larval series for subsequent description of morphological development.

Reproductive Biology and Developmental Osteology of the Florida Blenny, Chasmodes saburrae (Perciformes: Blenniidae)