Brighteyes Egg

An egg that counts as a fish: Brighteyes Egg appears during the "Egg Horde" admin event, in Winter, and the wiki tags it as Special. The event is the only place it is listed, so there is no regular zone to visit.

Its weight is small, between 1 kg and 8.4 kg, averaging 2.5 kg. The rate is what matters: C$2,500 per kg, so the average sale is C$6,250, 150th of the 742 documented fish. The maximum weight ranks only 479th of 663, which confirms that this is a light item that earns by price per kilo. Its base XP is 5,000, which is a very large figure for something that weighs so little.

The wiki names no other fish of the same tier and no rods, so it stands alone in this comparison.

The practical advice splits in two. If the Egg Horde event is running, it is worth grabbing every Brighteyes Egg you can, since both the sale price and the XP are far above what an average catch gives. If it is not running, there is nothing to do but wait. Keep an eye out for the winter timing and for the event announcement.