Tarantula

Tarantulas are arachnid enemies who appear in several Final Fantasy games. They make their debut appearance in Final Fantasy. Tarantulas are usually green in color.

Final Fantasy
In Final Fantasy, Tarantulas, named ARACHNID in the original Nintendo Entertainment System version, are relatively common enemies encountered on the World Map in the surrounding areas of Pravoka, Elfheim, Melmond, Mount Duergar, Marsh Cave, Mount Gulg, and the Cavern of Ice. They are also encountered within a few cave areas, including Marsh Cave (floors B1-B3), the Cavern of Earth (floors B1-B5), and the Giant's Cave.

During a battle, if a Tarantula attacks one of the Warriors of Light, there is a chance of them becoming poisoned.

Final Fantasy V
In Final Fantasy V, Tarantulas are only encountered in Castle Exdeath within Galuf's World. They absorb any Poison attacks but are weak to Ice attacks. Tarantulas have the Web ability, allowing them to inflict Slow on their target. Unlike most of their other appearances, Tarantulas are purple instead of green, and have the same appearance as Gloom Widows.