They grow to a maximum length of 30 cm but are normally 5 -- 20 cm .
The other three stripes are close to each other and there is a yellow spot on the cheek and another on the operculum .
each other grow to a maximum length of 30 cm but are normally 5 -- 20 cm .
The other three stripes are close to each other and there is a yellow spot on the cheek and another on the operculum .