Dr. Gerald (Gerry) Robert Allen, Australien
Info
Parioglossus aporos is another small arrow goby that forms small colonies in mangroves, sometimes near coral reefs.
Brief description:
Scales are present from the operculum margin to the end of the caudal peduncle, but are absent from the dorsolateral body surface, the midline of the abdomen, and the pectoral fin base, hence the name “scaleless or poreless.”
The mouth of the goby is inclined at an angle of 60-70° to the longitudinal axis of the body.
Males have 1-4 dorsal fin spines, which become progressively longer, with spine 4 longer than spine 5, and 5 longer than No. 6;
Dorsal fin spines 3-5 are elongated in males over 21 mm, spine 4 extends beyond the second dorsal fin base;
In females, no spines are elongated; spines 2-5 are approximately the same length and longer than spines 1 and 6; the anterior dorsal and anal fin rays 2-4 are longest in males, with the posterior rays becoming slightly shorter towards the last ray, which is longer than the penultimate ray.
The anterior dorsal and anal fin rays 3-5 are longest in females, with the rays becoming shorter towards the rear.
The last rays do not extend beyond the caudal peduncle in either sex.
The pectoral fins are elongated, the scales are present from the edge of the operculum to the end of the caudal peduncle, but are absent on the dorsolateral surface of the body, the midline of the abdomen, and the base of the pectoral fins.
Etymology:
The species name “aporos” comes from the Greek, a = without and poras = pores, named after the absence of head pores.
Brief description:
Scales are present from the operculum margin to the end of the caudal peduncle, but are absent from the dorsolateral body surface, the midline of the abdomen, and the pectoral fin base, hence the name “scaleless or poreless.”
The mouth of the goby is inclined at an angle of 60-70° to the longitudinal axis of the body.
Males have 1-4 dorsal fin spines, which become progressively longer, with spine 4 longer than spine 5, and 5 longer than No. 6;
Dorsal fin spines 3-5 are elongated in males over 21 mm, spine 4 extends beyond the second dorsal fin base;
In females, no spines are elongated; spines 2-5 are approximately the same length and longer than spines 1 and 6; the anterior dorsal and anal fin rays 2-4 are longest in males, with the posterior rays becoming slightly shorter towards the last ray, which is longer than the penultimate ray.
The anterior dorsal and anal fin rays 3-5 are longest in females, with the rays becoming shorter towards the rear.
The last rays do not extend beyond the caudal peduncle in either sex.
The pectoral fins are elongated, the scales are present from the edge of the operculum to the end of the caudal peduncle, but are absent on the dorsolateral surface of the body, the midline of the abdomen, and the base of the pectoral fins.
Etymology:
The species name “aporos” comes from the Greek, a = without and poras = pores, named after the absence of head pores.
