What’s the tallest dildo in my sex toy collection? Currently it’s the Uberrime Cephalatrox Tentacle, a squishy beasty that’s over a foot long! 12 whole inches of wiggly body-safe silicone.

There are a couple of uses for those many inches, and I can’t wait to tell you about them.

It’s no secret I like fantasy toys. Monster sex is inherently queer, and I enjoy playing with the taboo of non-humanoid shapes during sex. Fitting the Cephalatrox Tentacle Dildo into my Joque Harness and getting a blowjob? Literally out of this world.

cephalatrox design and features

The Cephalatrox Tentacle Dildo is one of Uberrime’s hand-sculpted models. Uberrime’s founder, Marco, shaped the Cephalatrox – and its many suckers – in clay, then created a cast so it could be copied in body-safe silicone. The suckers aren’t perfectly uniform, which gives the Cephalatrox a more organic feel than some 3D designed alternatives.

This dildo stands at an impressive 12.5 inches in total. Or at least my Cephalatrox stands (with a heavy lean.) The listing warns that some might not. So if you’re keen on keeping your towering tentacle on display, you might want to factor in decorative support.

Why so droopy? The Uberrime Cephalatrox Dildo is made with squishy silicone. You can flop it around or fold it in half with ease. That means penetration is painless, because the material yields to your body.

The Cephalatrox’s long, tapered body is shaped into two curves, like an undulating octopus limb. The tentacle’s narrow tip is just one inch in diameter, essentially an extra thick finger (or two if you have small hands.) It swells out to well over 2 inches in diameter towards the base – but most bodies won’t make it that far. The vagina is only around 6 to 8 inches deep when aroused, and your ass is about the same.

(That being said, with patience and practice, you can push past the sigmoid bend for even deeper anal penetration. You can read up on that elsewhere.)

On the Cephalatrox’s face/front, 38 suckers of gradually increasing size are bunched into two lines. The largest suckers are a little smaller than a quarter. They’re the same shape as the Teuthida Tentacle’s, but the bowls aren’t as deep, so they’re easier to clean and don’t “tug” as much. The Cephalatrox’s flat puckers provide a truly unique massage – but more on that in the next section!

This dildo’s backside is completely smooth. Like most of Uberrime’s toys, the silicone has a glossy finish that makes it glide with a bit of lube.

The Uberrime Cephalatrox Tentacle ends with a very short neck and a flared base. No, there’s no suction cup – but if you’re hard up for some added stability, you can try popping it into a toy mount sex pillow like the Liberator Bon Bon. It also fits in my Joque Harness (but just barely – more on that in the strap-on section of this review.)

SheVibe carries the Cephalatrox in a coloration they call “magneto”: a glittery marbling of purple, blue-green, and black. Very spacey! If aquatic alien doesn’t do it for you, you can order a Cephalatrox in a custom colorway direct through Uberrime.

our experience with cephy

I wasn’t sure how well my partner and I would handle the Cephalatrox Tentacle Dildo’s long body, but it’s surprisingly easy to wield. It’s heavy (over a pound!) and wiggly, but it’s just the right thickness and height that it doesn’t flop in my grasp unless I swing it around. The silicone is soft but more like muscle than fat. Literally the perfect density and flexibility for an undulating cephalopod limb! If you have small hands you might have a harder time grasping this monster, but my dudely paws didn’t struggle.

My partner Buster tested the Cephalatrox both vaginally and anally. In both holes, the Cephalatrox’s suckers create a gentle rippling massage as the toy is moved. We expected the suckers to subtly “suck” (catch air and drag when the toy is thrust) like the Teuthida’s suckers, but the Cephalatrox’s are too shallow. Cephy’s suckers are just here to provide a pervy petting. Fun, but admittedly less intense.

Almost better than the Cephalatrox’s sucker massage? The erotic sound effects! Lube this dildo up and it’ll audibly slorp and slurp as you thrust it.

Like most tentacle dildos, the Cephalatrox features a tapered shape. Buster especially appreciates this when using the Cephalatrox anally. The narrower tip is an easy introduction, and the toy’s gradual widening helps slowly stretch them out. The tip is also appreciated vaginally – being soft and slender, it doesn’t jar Buster’s cervix even when we’re cramming this dildo deep.

The undulating shape of the shaft makes for a sexy silhouette, but those curves don’t really translate in-use. The silicone is simply too flexible. If you’re after a good g-spot/prostate-targeting curve, you’ll have to look at firmer fare.

Cephy’s pliancy is great news when it comes to vaginal sex. Because you can fold this dildo over, the Cephalatrox’s excess inches can be rubbed against the vulva. The suckers’ whorls serve as soft, rubbing ridges you can rub all over. The silicone is soft enough that it’s easy to twist and contort it from side to side if up and down doesn’t do it for ya. Massaging this sucker-lined limb over your clitoris while slickly rocking the majority of the limb inside you? Yum.

using the tentacle in a harness

Listen, I’m a simple enby. If I see an extra large tentacle dildo, I’m gonna wanna make it my dick.

Lucky for me, the Cephalatrox Tentacle is one of the few large dildos I can cram into my SpareParts Joque Harness. It’s just squishy enough that I can fold the base and force it through the too-small silicone o-ring. If you’re doing this with longer fingernails, make sure you’re mindful of how soft Cephy is! You can accidentally tear your intergalactic friend.

Generally, you’re gonna want a larger o-ring. If – unlike the Joque – your harness allows you to swap out rings, SheVibe carries a bunch of options! This Tantus set has rings up to 2.5 inches. Just pay attention to how much room your harness has for the dildo’s base. The Cephalatrox’s base is pretty wide.

Being so long and heavy, the Cephalatrox drapes downward in my harness. (If I wore it backwards it would make a pretty good tail.) But the Cephalatrox is limber, so I can just grasp the bottom half of the shaft and direct it like a firehose. As I said before, this dildo is soft like muscle: it’s wiggly, not limp. Cephy’s flexibility makes it fun to maneuver for blowjobs and breast fucking, too. Just make sure to slick it up before the latter.

I do have to ‘babysit’ this dildo in-use more than other large toys. Its tapering girth and lack of a hook-like curve make it more likely to slip out of my partner. But to be honest, I don’t mind paying extra attention. My eyes are usually locked on its lube-drizzled length slithering in and out anyway.

As a large-bodied person, I sometimes struggle with using average length dildos in a harness. I have a big belly and thighs, so I need a toy with further reach. The Cephalatrox’s “excess” inches come in handy.

final thoughts

I’m a lucky duck who occasionally gets to visit Uberrime’s dildo-makin’ studio in person. Most of the time I try to keep my greedy paws to myself. But occasionally I’ll spy something in the stock bins that I have to take home. This towering tentacle called to me like an intergalactic siren.

I’m so glad I indulged my greed.

The Cephalatrox is everything I want from a giant tentacle: soft, flexible, girthy, and gorgeous. The more subdued sucker design makes this dildo less textually intense than its smaller counterpart, the Uberrime Teuthida. But I accept that the star of the show is the Cephalatrox’s size.

Best of all, the Cephalatrox’s ample inches are more than just for winning an otherworldly dick measuring contest. Even if you’re not interested in deep anal play, this toy’s length can add external stimulation to vaginal penetration, or provide further reach during strap-on sex. Cephy’s wriggled its way into my top 5 favorite big harness dildos.

Find a gigantic Uberrime Cephalatrox Tentacle Dildo on SheVibe or direct from Uberrime.

Thank you, Uberrime, letting me steal a Cephalatrox from the flop box. I consider Marco (Uberrime’s founder) a friend, but that doesn’t influence my opinions of their toys except to give me additional insight and appreciation for the artistry. I still hate the Amo (functionally, not aesthetically.)

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