Mer-Elves

The mer-elves are the rare, distant kin of the merfolk. They  must live within the waters of river or sea or die of dehydration. Mer-elves possess the tail of a great fish instead of legs, though once per day they may magically transform and split their tail into legs for up to an hour. They may be out of water for no more than one hour per day. They are said to possess magic that enables them to increase this time. They are most commonly encountered on the Great River Roglaroon, where they are the allies of the Roglo River-Folk.

Description:

Pale green skin, greenish white hair, green eyes, 6 ft. 0 in., 190 lbs, athletic build, typically Neutral.

Racial Traits: as per the PHB for Elf with the following modifications or additions:
• Amphibious (Ex): Mer-elves can breathe both air and water, although they rarely travel more than a few feet from the water’s edge. They may spend one hour on land per day without penalty but thereafter suffer one point of temporary Constitution damage for every thirty minutes beyond the first hour they remain on land in a 24-hour period.
• Transform (Su): Once per day, for an hour, a mer-elf may change his tail into a pair of human legs.
• Favored Class: Fighter or sorcerer
Languages: Starting languages as per the PHB, plus Aquan.