surface structure

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