River

Maruyama

One profile names the Maruyama. That is what has been written, not what lives there.

Species: 1
Families: 1
Photographed: 1 of 1
Difficulty rated: 1 of 1

That fish is also recorded from

Hidaka
Ibana
Ibo
Ina
Kako
Kumozu
Mizukoe
Takatsu

Rhinogobius flumineus

Gobiidae · Mizuno, 1960

In addition, there appear to exist two colour forms based on male dorsal-fin morphology and patterning; one in which the 4th ray of the first dorsal-fin is longest with a square bluish-black blotch on the anterior ⅔ of the fin, and a second in which the 2nd and 3rd rays of the first dorsal-fin are longest with the fin itself paler and lacking dark markings.

Moderate