hypural

1.hypural notch The crease formed when the caudal fin is bent or flexed.

凹槽当鳍被弯曲或弯曲的候，形成的摺。

2.hypural bones The fan-shaped series of bones (sometimes fused to one or two plate-like bones) to which the caudal fin rays are attached.

鳍鳍条附的扇形成列硬(有融合成一或二个板状硬)。