Skulltula

Skulltulas are recurring enemies in the Legend of Zelda series. They are sizable spiders that exist in many dark and discrete places, such as caverns or temples, inhabited by other malevolent creatures. A mark in the shape of a skull appears on their abdomen, which seems to be a admonition all for all those who may come in contact with the creature to stay away if they wish for their own safety. When Skulltulas spot a trespasser, they attack it by dropping down from the ceiling with their web.

The Legend of Zelda: Ocarina of Time and Majora's Mask
In both Ocarina of Time and Majora's Mask Skulltulas share the same appearance and attack method. There also exist two other types of Skulltula as well; smaller Skullwalltulas and Gold Skulltulas.

In Ocarina of Time, the backsides of Skulltulas are vulnerable to sword strikes; they can also be defeated if Link hits one with his Hookshot or his Fairy Bow.

In Majora's Mask, Skulltulas are not vulnerable to hookshot strikes; however, they can still be dispatched with the Hero's Bow. They are not as frequently encountered as in Ocarina of Time, however, the first regular enemy encountered in the game is a Skulltula, which appears inside the Bombers' Hideout.

The Legend of Zelda: Twilight Princess
Skulltulas have a different attack pattern in Twilight Princess. They attack by crawling towards Link and using a biting attack. Also, their exoskeletons offer much more protection than before. However, they can easily be dispatched by attacking their heads, either with stabs of a sword or with basic, non-jump wolf attacks. Once stunned, Skulltulas can be defeated with the Ending Blow.

The Legend of Zelda: Phantom Hourglass
Skulltulas appear in the Ghost Ship dungeon. This incarnation of Skulltulas does not feature their trademark hardened shells. While they can be killed, a new one will appear instantly after a Skulltula has been defeated; a room can never fully be cleared of Skulltulas. When Link unknowingly aids the Diabolical Cubus Sisters, they appear to fear these creatures; however, knowing whether or not it is part of the act is not possible.