What is "gobionellus oceanicus"

Emerald \Em"er*ald\, a. Of a rich green color, like that of the emerald. ``Emerald meadows.''
--Byron.

Emerald fish (Zo["o]l.), a fish of the Gulf of Mexico ( Gobionellus oceanicus), remarkable for the brilliant green and blue color of the base of the tongue; -- whence the name; -- called also esmeralda.

Emerald green, a very durable pigment, of a vivid light green color, made from the arseniate of copper; green bice; Scheele's green; -- also used adjectively; as, emerald green crystals.

Emerald Isle, a name given to Ireland on account of the brightness of its verdure.

Emerald spodumene, or Lithia emerald. (Min.) See Hiddenite.

Emerald nickel. (Min.) See Zaratite.

The highfin goby (Gobionellus oceanicus) is a species of fish belonging to the family Gobiidae.