Wavelength‐specific thresholds of artificially reared Japanese eelAnguilla japonicalarvae determined from negative‐phototactic behaviours

We report wavelength-specific thresholds of leptocephali of Japanese eels Anguilla japonica determined from their negative-phototactic behaviour. Leptocephali are most sensitive to wavelengths 400-500 nm and at very short wavelengths. Their visual sensitivity decreases more sharply at wavelengths >500 nm than it does at wavelengths