Answer | Crossword Clue |
---|---|
diphycercal | of fishes, etc, having the tail symmetrical about the vertebral column |
heterocercal | (of a fish's tail) Having unequal upper and lower lobes, usually with the vertebral column passing into the upper |
heterocercal | having the vertebral column passing into the upper lobe of the tail, which is usually larger than the lower, as in sharks |