surface structure

papilla Organ scale Organ paired limb/fin bud Organ endostyle Bone columella nasi Organ caudal fin upper lobe Organ caudal fin lower lobe Organ barbel primordium Organ beak Bone ala of nose Organ urogenital papilla Organ nuptial tubercle Organ tooth surface structure Organ median fin fold Organ Westoll line Organ upper beak Organ dorsal organ Organ Hatschek's pit Organ tunicate tunic Organ nuchal hump Organ adipose eyelid Organ external integument structure Gland rhinarium Organ lower beak Organ opercular flap Organ vent Organ caudal peduncle Organ unicellular gland Gland