Loot anchor
From Inkipedia, the Splatoon wiki
A loot anchor is a device in Splatoon 3 that has 8 legs and a red LED light at the top. In The Crater and Alterna they can be found either out in the open, buried in the snow, or invisible. All varieties can be shot at with ink to reveal and destroy them. They can be tracked down with Smallfry. Loot anchors can contain Sunken Scrolls, Sardinium, Gold Records, Power Eggs or Decorations.