Appendages (tentacles) – The character has tentacles.
Carnage (Marvel) can manifest multiple tentacles.
Doctor Octopus (Marvel) has mechanical tentacles.
Octoboss (Image) wins the prize as the ugliest villain with tentacles (Official Handbook of the Invincible Universe #2).
Callisto (Marvel) was a fearsome knife fighter with two arms and is more dangerous with her new tentacles (Official Handbook of the Marvel Universe #1, 2006).
Commander Cypher has tentacles that can be used for computer interfaces and as bladed weapons in Mystique & Sabretooth #4 (Marvel).
Mystique fights a one-shot villain with tentacles in Mystique #17 (Marvel).
Sweet Face has a beautiful face and a body covered with tendrils in the Ultraverse (1993 SkyBox Ultraverse).
The Red Octopus has mechanical tentacles and appears in Gladstone’s School for World Conquerors #2 (Image).
Balhannoth (D&D 4th Edition – Monster Manual 1), Carrion Crawler (D&D 4th Edition – Monster Manual 1), Displacer Beast (D&D 4th Edition – Monster Manual 1), Grill (D&D 4th Edition – Monster Manual 1), Otyugh (D&D 4th Edition – Monster Manual 1), and Roper (D&D 4th Edition – Monster Manual 1).
The Shi’ar Imperial Guard has one tentacled alien, Webwing (Uncanny X-Men V1 #157).
Archlurker – Creature Collection II. Dark Menagerie
Bonedrinker – D&D 3.5 – Monster Manual III
Cloudbeast – Field Guide to Creatures of the Dreamlands
Dark Young – Field Guide to Cthulhu Monsters
Darktentacles – TSR 2158 Monstrous Compendium Annual Volume 2
Deep Spawn – TSR 2140A Monstrous Manual
Doombot (Marvel) – Avengers A.I #7 (2014)
Dune Delver – Creature Collection I
Biollante is an enemy of Godzilla.
Grick – D&D 3.5 – Monster Manual I
Overghast – Creature Collection III. Savage Bestiary
Prismatic Roper – D&D 3.5 – Monster Manual III
Sand Trapper – Creature Collection III. Savage Bestiary
Shellrak – Creature Collection III. Savage Bestiary
Suwyze – TSR 2145 Monstrous Compendium Annual Volume 1
Aphrodite IX fights an enemy with tentacles in Cyberforce – Artifacts #0 (Top Cow).
Some tentacle action in New Avengers #16.
Shuma-Gorath (Marvel) in Marvel Fact Files #46 (Eaglemoss).