Anchor Ice can be dangerous, they can act like glue to animals. When the ice looses it's grip on the bottom, it will float to the surface or beneath an ice shelf, those pieces with animals stuck to them will be carried up too and can die(see "Frozen Planet"). Especially in the Antarctic, anchor ice has been implicated in drastic zonation of the subtidal fauna. Many animals are directly affected by the growth of anchor ice, and certain sponges have been shown to readily grow anchor ice and to be damaged by it. Anchor ice may also grow on animate or inanimate objects and lift them from the sea floor. In the Antarctic this will most likely result in the death of an organism, since during much of the year the ocean is covered by annual sea ice, and the organism is likely to become incorporated into this.