Yaddlefish

From Tardis Wiki, the free Doctor Who reference

The yaddlefish was a type of fish native to Gallifrey. They lived in rivers and could sing. Yaddlefish were caught and eaten by the people of Slothe.

The yaddlefish moved to rivers away from Slothe after they were overfished by the villagers. (PROSE: Blind Fury [+]Loading...["Blind Fury (short story)"])