This enemy is, quite frankly, a flying Yellow Big Gel Tree from Frozen Lake. They have the same LP, AT, AGI, resistances, and range as their non-moving cohorts. The only difference between the two besides the species, are EXP/Gold drops, level, and size. These enemies appear in somewhat large groups, and given their very dangerous attack, they can be lethal to an unprepared team. Baiting them is the best option.
Yellow Gel Copter