Figure 4
From: Nocturnality constrains morphological and functional diversity in the eyes of reef fishes
Eyes of nocturnal and diurnal teleost reef fishes. Lateral view of the left eyes of nocturnal ((a) the haemulid Haemulon sciurus, (b) the apogonid Pterapogon kauderni) and diurnal ((c) the labrid Clepticus parrae, (d) the serranid Epinephelus cruentatus) reef teleosts. Note the large rounded pupil in nocturnal fish, and the pronounced rostral aphakic gap in Epinephelus cruentatus. Not to scale.