Smalltooth Whiptail (Pentapodus Caninus) キツネウオ (size 35 cm)
A juvenile Smalltooth Whiptail.
There are a few other species of Pentapodus that have juveniles that look much like this.
Another juvenile Smalltooth Whiptail.
A larger Smalltooth Whiptail. Amami
A mature Smalltooth Whiptail (above Masked Rabbitfish). There are also other Pentapodus sp. that look much like this too.