AbstractSpectral properties of the horizontal cells and the bipolar cells in the dace retina were studied under mesopic and/or photopic conditions. Four types of horizontal cells were identified: two L types (L1 and L2) and two C types (RB and RGB). The L1 cell has its spectral peak at about 590 nm, and the L2 cell peaks at about 630 nm. The wavelength at which a maximum hyperpolarization of the RB cell is produced is around 460 nm, and a subpeak is seen around the green‐yellow spectral region. The maximum hyperpolarizing response of the RGB cell appears at 400 nm, and it depolarizes over a wide spectral range (460–660 nm). The high sensitivity to blue light of C‐type horizontal cells is most characteristic in the dace. The bipolar cells are classified into two groups, non‐color‐coded cells and color‐coded cells, by the spectral properties of the center response. The non‐color‐coded cells have broad spectral sensitivities, although the spectral maxima are different in the center and the surround in some cells. It is clear from the spectral response curves that there are no large impingements of blue cones in the non‐color‐coded bipolar cells as compared with the horizontal cells. Spectral properties of the color‐coded cells are n
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