hypural joint

The joint between the caudal fin of a fish and the last of its vertebrae.

Japanese Meaning

魚の尾ひれと最終脊椎との間に位置する関節

When examining the specimen under the microscope, the ichthyologist noted an unusual ossification at the hypural joint.

標本を顕微鏡で観察したとき、魚類学者は尾鰭と最後の椎骨の間の関節に異常な骨化を認めた。

Sense（1）

The joint between the caudal fin of a fish and the last of its vertebrae.

hypural joints

（ plural ）