---
title: "Atlantic Cod vs Lion's Mane Jellyfish: Who Would Win?"
description: "Who would win, Atlantic Cod or Lion's Mane Jellyfish? Atlantic Cod wins with a 78% chance in our 3-round battle simulation."
image: "https://animaltracks.wiki/icon-512.png"
---

# Atlantic Cod vs Lion's Mane Jellyfish: Who Would Win?

Atlantic Cod wins this matchup, with a 78% chance of victory against 22% for Lion's Mane Jellyfish in our 3-round simulation. Its biggest advantage is strike power, 19 to 10 out of 100.

Both are at home in polar ice and tundra, so the simulation's neutral ground is close to where they actually live.

## Verdict: Atlantic Cod
- **Win probability**: Atlantic Cod 78%, Lion's Mane Jellyfish 22%
- **Decisive weapon**: Has lost the genes for MHC II, a standard part of the jawed-vertebrate immune system, but carries a highly expanded set of MHC I genes

### Round 1: Opening Clash & Speed

Atlantic Cod seizes the opening initiative with superior agility (46 vs 38), circling Lion's Mane Jellyfish and striking from an advantageous flank.

### Round 2: Clash of Superpowers

Atlantic Cod unleashes its core evolutionary weapon: Has lost the genes for MHC II, a standard part of the jawed-vertebrate immune system, but carries a highly expanded set of MHC I genes. Lion's Mane Jellyfish's defense rating of 21 is severely tested as the attack breaches defenses.

### Round 3: Final Resolution

Deep into round three, Atlantic Cod's superior endurance and firepower seal the contest. Delivering a definitive blow backed by Sleater-Kinney's soundtrack, it incapacitates Lion's Mane Jellyfish.

## Fighter 1: Atlantic Cod (*Gadus morhua*)
- **Superpower**: Has lost the genes for MHC II, a standard part of the jawed-vertebrate immune system, but carries a highly expanded set of MHC I genes
- **Danger Level**: Low
- **Conservation Status**: Vulnerable
- **Habitat**: Cold North Atlantic and Arctic seas, from Greenland and Iceland to the Bay of Biscay and, on the American side, south to Cape Hatteras
- **Musical Match**: Sleater-Kinney (90s Riot Grrrl & Grunge)
- **Full Dossier**: [Read Atlantic Cod Profile](https://animaltracks.wiki/animals/atlantic-cod/)

## Fighter 2: Lion's Mane Jellyfish (*Cyanea capillata*)
- **Superpower**: Tentacles speculated to trail up to 36.6 meters (120 feet); many authorities rank it the longest of all jellyfish.
- **Danger Level**: Medium
- **Conservation Status**: Not Evaluated
- **Habitat**: Cold and temperate waters of the Arctic, Atlantic, and Pacific Oceans, including the North Sea and Baltic Sea
- **Musical Match**: Tim Hecker (Glacial Ambient & Drone Soundscapes)
- **Full Dossier**: [Read Lion's Mane Jellyfish Profile](https://animaltracks.wiki/animals/lions-mane-jellyfish/)

## Biological Matchup Context
When contrasting Atlantic Cod against Lion's Mane Jellyfish, tactical victory depends on physiological engagement range, strike speed, armor density, and chemical or physical defense mechanisms:
- **Atlantic Cod**: A big bottom predator that lost an immune pathway jawed vertebrates normally keep.
- **Lion's Mane Jellyfish**: Often called the world's longest jellyfish, with tentacles speculated to trail up to 120 feet through Arctic and temperate seas.

Pick your own matchup in the interactive arena: [Battle Arena](https://animaltracks.wiki/compare/atlantic-cod-vs-lions-mane-jellyfish/)

> The Battle Arena is an algorithmic thought experiment for education and entertainment. Never provoke, fight, or disturb animals in the wild.

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