ホオジロザメ

📖 1. 概要

体長6m以上、体重2トンを超える現生最大の肉食魚類です。筋肉の温度を海水より高く保つ恒温性（内温性、Endothermy）を持っています。

🌐 Wikipedia 要約抜粋

The great white shark, also known as the white shark, white pointer, or great white, is a large shark. It is closely related to the mako sharks, the porbeagle, and the salmon shark. It is a robustly built species with a grayish upperside and a white underside. The white shark is one of the largest living shark and fish species, though it is still smaller than the whale shark and basking shark. It has about 300 triangular, serrated teeth that are continuously replaced. Its massive, fatty liver can reach over a quarter of its body weight, providing buoyancy and storing energy. The species is partially warm-blooded, an adaptation that allows it to remain active in colder waters.

🦴 2. 体の構造と特徴

吻端の「ロレンチーニ器官」で生物の心拍による微弱な磁場を感知し、300本のノコギリ状の歯は生涯で数万本が新しく生え替わります。

🔍 3. 生態と行動

アザラシを狩る際、深海から垂直に突進して水面上に体全体が飛び出すブリーチング（Breaching）狩猟法を駆使します。

🇰🇷 4. 韓国との関わり

韓国の西海・南海・東海沿岸でも水温上昇期に出没し、海洋安全研究の対象となっています。