Pretty Lagoongoby (Oplopomus oplopomus) ケショウハゼ also Spinecheek Goby size 10cm
I think that this is a male Pretty Lagoongoby. They live in burrows in the sandy lagoon areas. Amami 2024
Possibly a female Pretty Lagoongoby. I cannot find very good information on this fish. I think that it gets mixed up with the similar Oplopomus caninoides a lot. Amami 2024
This may be a juvenile Pretty Lagoongoby. Amami 2024