Abstract:The community structure, dominant species,spatial distribution, and diversity of ichthyoplankton in Laizhou Bay were studied based on trawl survey data in spring (May) from 2007 to 2010. Twelve fixed sampling stations were established in the investigation area. During the investigation, 26 ichthyoplankton taxa were collected, of which 24 taxa were identified and belonged to 24 genera, 16 families, and 6 orders. One taxon of Callionymidae fish was identified to the family level only, and the taxon of an egg sample was unidentified. The distribution of ichthyoplankton in Laizhou Bay was uneven; eggs were richer in the west and southeast, but larvae were richer in the west. The dominant eggs in all years were Konosiruspunctatus; 83% (n=5543) of all specimens in 2008 were K. punctatus. The dominant larvae in 2007 and 2008 were Engraulis japonicas, and Gobiidae fishes were dominant in 2009 and 2010. The dominant species of larvae changed from pelagic-neritic continental shelf fish to demersal continental shelf species. The diversity (H) and evenness (J) indices showed a decreasing trend from 2007, and the species diversity (S) and species richness (D) indices showed a decreasing trend from 2008. Cluster analysis showed significant differences among years in the community structure of eggs, larvae, and juveniles; the community structure of eggs and larvae was similar in 2007 and 2008. Compared to results from a 1982 survey offshoreof Shandong Province, the community structure of ichthyoplankton in Laizhou Bay has changed. K. punctatuswas the dominant species, and the numbers of economic fish species such as Larimichthyspolyactis have decreased.