スミソニアン国立動物園のインスタグラム(smithsonianzoo) - 2月13日 05時02分

A freshwater stingray's spine (a.k.a. the stinger) has grooves underneath that contain venom. Stingrays shed and replace their spines. Sometimes, they will have two stingers as a new one grows in to replace the old! Every day at 11 a.m., meet a keeper and watch the fish feeding demonstration at Amazonia. PLAN YOUR VISIT: https://nationalzoo.si.edu/visit/daily-events.

[BIHAKUEN]UVシールド(UVShield)

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