any observable deformity, dysmorphism, or dysmorphic feature corresponding to a major difference in the shape of opercular compared to its average shape

opercular deformation

opercular malformation

INRA:PHASE "INRA PHASE"

TroutPresent

CarpPresent

SalmonPresent

SeaBassPresent

CodPresent

SeaBreamPresent

TilapiaPresent