Ichthyological terms, not general ones.
The number of more-or-less vertically-arranged scale rows present between the upper end of the gill opening and the caudal fin base. Sometimes referred to as vertical scale rows and used in meristic counts when the lateral line is absent, incompletely pored or otherwise difficult to distinguish.
Used in 9 profiles
Number of scales in the diagonal row between the orgins of dorsal and anal fins in a fish specimen, excluding the lateral line scales.
Used in 10 profiles
Sensory organ comprising a series of neuromasts running along the head and flanks and used to detect movement and vibration in the surrounding water. Also known as the lateralis system and visible as one or more rows of pored scales of varying length in many fishes.
Used in 366 profiles