Fish Hook

Last updated: July 3, 2026

What is a fish hook?

The name comes from the way an angler’s hook catches a fish by the inside of the mouth. In the cage, the human version works the same way: a finger slips inside the cheek, the nostril, or behind the corner of the mouth, then drags outward and away from the centerline of the face. The Association of Boxing Commissions’ foul list defines it as any attempt to use the fingers to attack an opponent’s “mouth, nose, or ears, stretching the skin to that area.”

Skin on the face has almost no give in that direction. A hard pull can split the corner of the mouth or lacerate the inside of the cheek, which is why the rulebooks treat it as a foul rather than a technique.

Fans sometimes assume any hand near the face counts. It doesn’t. Punches, palm strikes, and legal grips around the jaw or head are all fine. The foul is specifically the insertion and pull.

How a fish hook happens in a fight

Most fish hooks happen on the ground. A fighter working for back control or hand-fighting near an opponent’s face can end up with fingers at the mouth line, and from there, the difference between a legal grip and a foul is a few centimeters.

Some are deliberate, a nasty shortcut to turn an opponent’s head or force them to give up a defensive grip. Others are pure accident. In a scramble, hands slide across sweaty skin, and referees often can’t see either kind because the foul happens in tight quarters, hidden between two bodies.

The sport’s standard fingerless gloves make the foul physically possible in the first place. Boxing-style closed gloves would prevent it, but they would also make grappling unworkable, so open fingers stay, and the rule does the policing instead.

Why the fish hook is banned

The inside of the cheek tears under forces a fighter’s hands can easily produce. A serious fish hook can rip the mouth open toward the ear, and that kind of laceration needs surgical repair and can leave lasting scarring. Unlike a choke or a joint lock, there is also no skilled defense to it. The only real counter is biting the finger, which is itself a foul.

The ban arrived early in the sport’s cleanup era. UFC 1 in November 1993 ran with a two-foul rulebook, no biting, and no eye gouging, according to Fight Encyclopedia’s rules history. The UFC added a no-fish-hooking rule at its Ultimate Ultimate event in December 1995, per rules timelines published by Combatpit and SQAF.

When New Jersey adopted the Unified Rules of MMA in 2001, fish hooking was codified among the 31 listed fouls, alongside headbutts, groin strikes, and small joint manipulation. It sits at number four on the ABC’s 2017 fouls document, right after biting. Outside regulated sport, the move survives in some self-defense curricula, such as Krav Maga, and it was once part of catch wrestling, according to Wikipedia’s entry on the technique.

Penalties for a fish hook

There is no fixed sentence for a fish hook. The referee judges intent and damage, and the outcome scales accordingly.

Situation	Likely outcome
Referee spots a minor or first offense	Verbal warning
Clear foul during action	One-point deduction
Intentional foul, injury, fight continues	Two-point deduction under the Unified Rules
Intentional foul causes a fight-ending injury	Disqualification
Accidental foul ends the fight early	No contest

A no contest means the bout is wiped from the win-loss ledger for both fighters, since neither earned the result. Disqualification hands the win to the fouled fighter.

Enforcement depends on the referee actually seeing the foul. Because fish hooks tend to happen in grappling exchanges, plenty go unpunished in real time and only surface afterward in photos or replays.

Fish hook vs eye gouge

The two fouls get mixed up constantly, partly because the term fish hooking is sometimes used loosely to describe attacks on the eye socket. The Unified Rules treat them as separate fouls with separate definitions.

	Fish hook	Eye gouge
Target	Mouth, nose, or ears	Eyes
Method	Finger inserted, skin pulled	Pressure from fingers, chin, or elbow
Unified Rules foul number	4	2
Main danger	Torn facial tissue	Permanent vision damage
Legal look-alike	Grips around the jaw or head	Punches that land on the eye socket

The practical distinction: pulling at an orifice is fish hooking, pressing into the eye is gouging. A legal punch that happens to hit the eye socket is neither, under the ABC’s foul definitions.

Frequently Asked Questions

Is fish hooking illegal in the UFC?

Yes. The UFC follows the Unified Rules of MMA, which list fish hooking as a foul. That has been the case since the promotion first banned it in December 1995.

What happens if a fighter fish hooks someone?

Anything from a warning to disqualification, depending on intent and injury. If an accidental fish hook ends the fight, the result is a no contest, and neither fighter takes the win.

Why is it called fish hooking?

The motion mirrors a fishing hook catching a fish inside the mouth: a curved finger pulls at the cheek or lip from the inside.

Is fish hooking allowed in BJJ or wrestling?

No. Grappling rule sets ban it outright, and wrestling rules restrict hand contact with the face area altogether.

Is fish hooking legal in self-defense?

Some systems, including Krav Maga, teach it for emergencies. Legally, it can still count as assault causing disfigurement, so it belongs to genuine last-resort situations only.

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Sources

1. Association of Boxing Commissions. “2017 Unified Rules of MMA: Fouls.”
   https://www.abcboxing.com/wp-content/uploads/2015/09/unified_rules_fouls_rev0816.pdf. Accessed July 4, 2026.
2. Fight Encyclopedia. “Most Controversial Rule Changes in MMA History.”
   https://fightencyclopedia.com/blog/blog-most-controversial-rule-changes-in-mma. Accessed July 4, 2026.
3. SQAF. “What Were the Original UFC Rules?”
   https://sqaf.club/original-ufc-rules/. Accessed July 4, 2026.
4. Combatpit. “How UFC Rules Have Evolved Over Time.”
   https://www.combatpit.com/blog/how-ufc-rules-evolved-over-time. Accessed July 4, 2026.
5. Wikipedia. “Fish-hooking.”
   https://en.wikipedia.org/wiki/Fish-hooking. Accessed July 4, 2026.
6. IMMAF. “Unified Rules of MMA.”
   https://immaf.org/wp-content/uploads/2020/02/IMMAF-Rules-Document-as-of-March-2017.pdf. Accessed July 4, 2026.

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