Small fish - minnow, pinkeen, a thorn-back. Tawrneens are caught either in net or by worm tied to end of string.
Use:
Derivation:
Unknown, but note thorn on spine of fish and 'een' diminuitive in Irish. And note 'TairnÃn' or 'TairngÃn' - a small nail, a thorn-back. (Ó h-Éaluithe).