The pyjama shark is the larger and thicker-bodied of the two Poroderma species, growing to 1.1 m (3.6 ft) long and 7.9 kg (17 lb) or more in weight. Both sexes grow to roughly the same maximum size. The head and snout are short and slightly flattened, with a narrowly parabolic outline when viewed from above or below. Each nostril is split into tiny incurrent and excurrent openings by a flap of skin in front the flap has a three-lobed shape with the central lobe forming a long, conical barbel. The barbels are thicker than in the leopard catshark, and do not reach the mouth. The eyes are horizontally oval and placed rather high on the head, with rudimentary nictitating membranes (protective third eyelids) and a thick ridge running underneath. The sizable mouth forms a broad arch, with short furrows extending from the corners onto both the upper and lower jaws the upper teeth are exposed when the mouth is closed. There are 18󈞅 and 14󈞄 tooth rows on either side of the upper and lower jaws, respectively. The teeth have a slender central cusp flanked by a pair of small cusplets those of adult males are slightly thicker than those of females. The body is fairly compressed from side to side and tapers towards the tail. The two dorsal fins are placed far back: the first originates over the rear of the pelvic fins while the second originates over the midpoint of the anal fin. The first dorsal is much larger than the second. The pectoral fins ...Learn more about Striped Catshark