These enemies are essentially land-bound Pink Gel Trees, having the same LP, method of attack (firing a Pellet in an arc) and damage values. Since they're on the ground, hitting them with melee is much easier. Like the Cavern 7 trees, they have a weakness to Fire. Spread Explosion 7 can tear through hordes easily if they're easily accessible. For trees behind walls, the Electric Shock 5 can hit them.