![Hospital seals](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/a/a8/Hospital_seals.jpg/revision/latest/scale-to-width-down/180?cb=20130916200246&path-prefix=en)
Seals
A seal was a type of aquatic animal originating on Earth.
In 1986, the Mercy Hospital on Earth kept many pictures on the walls of its corridors, including a picture of seals. (Star Trek IV: The Voyage Home)
In 2399, Kestra Troi-Riker had a drawing of a seahorse and a seal that was cutout and tacked or taped to her wall of her bedroom beside her bunk bed. (PIC: "Nepenthe")