Parasite

Only the Aliens admin event offers the Parasite, a Special fish that can be caught anywhere while the event runs. Its bait is an alien emoji, and no time of day or weather applies. The wiki warns that it is a hard fish that darts around the bar erratically, and the exact progress-speed penalty while reeling has not been filled in.

Its look is that of a fantasy alien monster with a giant gaping mouth for leeching from its victims, an armored body, a spiky tail and six limbs that crawl over unsuspecting prey. According to the trivia, the model is based on the "Alien Parasite" weapon from the official Roblox catalog, which summons a parasite to attack other players. No XP, weight or catch quip has been recorded for it yet.