Fig. 1. (A) Whole gills from P. hypophthalmus. The individual was 18 cm long and weighed 80 g. None of the gill filaments are reduced, and the filaments appear to be the same length
on all 4 gill arches. (B) Close-up of the tip of several gill filaments. This individual was 40 cm long and weighed 1 kg. Filaments and secondary lamellae have been pointed out.