They gather together on rocky shoals and sing together as a harmony. Their human-like voices can be misleading because they sound like a child lost at sea.
Selkid are a human-like Pokémon with a large, teardrop-shaped head, a streamlined body, and a tail resembling a dolphin's. They have a yellow ruff around their neck and yellow spots on their cheeks. They have dark blue arms and tiny fins for legs.
Selkid is a female-only species.
Selkid can sing songs which can confuse an enemy or put them to sleep.
Selkid live in the sea but congregate on rocky shores to sing together. They eat crustaceans, kelp, and small fish.
Selkid's body shape is very similar to that of Snivy.
Selkid is based on a selkie, a mythological creature that lives as a seal in water, but may shed its skin to take human form on land. Its singing ability is likely derived from the sirens of Greek mythology, beings whose enchanting songs would lure sailors to their doom upon the rocks.
In addition to making the sprites more distinctive. Selkid and Syrentide's altered Shiny sprite color scheme may have been intended as a reference to another Nintendo property in the form of the Zora Champion character Mipha from The Legend of Zelda Breath of The Wild. As, in addition to the color scheme, the character was also female, and was a Zora, a race in the Zelda series with aquatic attributes. Breath of the Wild also came out about a year after the distribution of Pokemon Uranium online, and the patch featuring the changed sprite was made available about 3 months after the game's release.