---
icon: jurassic-saga:inventory/mesolimulus_coin
history:
  - version: '0.1'
    date: null
    changes:
      - Added Mesolimulus
  - version: 0.1.8
    date: 26.01.2026
    changes:
      - Mesolimulus era corrected (Triassic → Jurassic)
---


<Callout variant="info">
    The last update on this page was on: 15th July 2026 (v0.1.11.1)
</Callout>

# Mesolimulus walchi

<Asset location="jurassic-saga:inventory/mesolimulus_fossil_remains" width={48} height={48}/> <Asset location="jurassic-saga:inventory/mesolimulus_coin" width={48} height={48}/>

| | |
|---|---|
| **Health** | Adult 40 Health (x20 Hearts) |
| **Behavior** | Passive |
| **Diet** | Carnivore |
| **Size** | 1 Block Long, 1 Block Tall |
| **Drops** | Mesolimulus Raw Meat, Mesolimulus Remains |
| **Breedable** | Not yet implemented |
| **Obtained** | Fossil Revival |
| **Egg Type** | Spider Egg |
| **Time Period** | Jurassic |
| **Achievement** | Living Fossil |


An ancient genus of horseshoe crab dating back to the Jurassic. It resembled modern horseshoe crabs and is an example of evolutionary stability.
These creatures lived in shallow marine environments and fed on small invertebrates.

---

## Appearance
- Dome-shaped carapace similar to modern horseshoe crabs
- Long, pointed telson (tail spine) used for righting itself when flipped
- Multiple small legs and gill plates on the underside
- In-game size: **1 block long** and **1 block tall**

---

## Behavior
- **Passive**: Will not attack players or other mobs
- Slowly crawls along the seafloor or shallow waterbeds
- Burrows slightly into sand when resting or hiding
- Flees by scuttling away when disturbed

---

## Obtaining
Mesolimulus does not spawn naturally. To obtain one, you must:
1. Find ![](@jurassic-saga:textures/item/natural/entity/animal/v1/extinct/mesolimulus/mesolimulus_fossil_remains) [**Mesolimulus Remains**]($content/items/fossil) or fossils
2. Use the fossil revival process to create a Mesolimulus
3. Hatch from a **Spider Egg** type egg

---

## Drops
When defeated, Mesolimulus may drop:
- ![](@jurassic-saga:textures/item/natural/entity/animal/v1/extinct/mesolimulus/mesolimulus_fossil_remains) [**Mesolimulus Remains**]($content/items/fossil)
- ![](@jurassic-saga:textures/item/natural/entity/animal/v1/extinct/mesolimulus/mesolimulus_raw) [**Mesolimulus Raw Meat**]($content/items/meats)

---

## Sounds

### Walk Sounds
<table style={{borderCollapse: "collapse"}}>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Walk 1</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_walk01.ogg"/></td>
    </tr>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Walk 2</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_walk02.ogg"/></td>
    </tr>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Walk 3</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_walk03.ogg"/></td>
    </tr>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Walk 4</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_walk04.ogg"/></td>
    </tr>
</table>

### Death Sounds
<table style={{borderCollapse: "collapse"}}>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Death</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_death.ogg"/></td>
    </tr>
</table>

### Hurt Sounds
<table style={{borderCollapse: "collapse"}}>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Hurt 1</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_hurt01.ogg"/></td>
    </tr>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Hurt 2</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_hurt02.ogg"/></td>
    </tr>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Hurt 3</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_hurt03.ogg"/></td>
    </tr>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Hurt 4</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_hurt04.ogg"/></td>
    </tr>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Hurt 5</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_hurt05.ogg"/></td>
    </tr>
</table>

### Living Sounds
<table style={{borderCollapse: "collapse"}}>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Living 1</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_living01.ogg"/></td>
    </tr>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Living 2</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_living02.ogg"/></td>
    </tr>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Living 3</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_living03.ogg"/></td>
    </tr>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{fontWeight: "bold"}}>Living 4</td>
        <td><Audio controls src="jurassic-saga:sounds/mesolimulus/mesolimulus_living04.ogg"/></td>
    </tr>
</table>

---

## Gallery
### Community Images
<table style={{borderCollapse: "collapse"}}>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{textAlign: "center"}}>
            <img width={256} src="https://i.imgur.com/qb3veJR.png" alt="Mesolimulus by Iron"/>
<div style={{marginTop: "6px", fontSize: "14px", opacity: 0.8}}>
Mesolimulus by Iron
<sup>[[1]](https://discord.com/channels/476209601075740672/615231162893205521/1472025011736019005)</sup>
</div>
        </td>
    </tr>
</table>

### Skins
<table style={{borderCollapse: "collapse"}}>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{textAlign: "center"}}>
            <img width={256} src="https://i.imgur.com/q3Z99dI.png" alt="Mesolimulus Cosmetic Gene - Ocean"/>
<div style={{marginTop: "6px", fontSize: "14px", opacity: 0.8}}>
Ocean
</div>
        </td>
    </tr>
</table>

### Development Images
<table style={{borderCollapse: "collapse"}}>
    <tr style={{backgroundColor: "transparent"}}>
        <td style={{textAlign: "center"}}>
            <img width={256} src="https://i.imgur.com/Qv13W0x.png" alt="Mesolimulus Showcase"/>
<div style={{marginTop: "6px", fontSize: "14px", opacity: 0.8}}>
Mesolimulus Showcase
<sup>[[2]](https://discord.com/channels/476209601075740672/620220431294529536/670316414447517696)</sup>
</div>
        </td>
        <td style={{textAlign: "center"}}>
            <img width={256} src="https://i.imgur.com/3pgtl5R.png" alt="Baby Mesolimulus Showcase"/>
<div style={{marginTop: "6px", fontSize: "14px", opacity: 0.8}}>
Baby Mesolimulus Showcase
<sup>[[3]](https://discord.com/channels/476209601075740672/620220431294529536/746019644099526718)</sup>
</div>
        </td>
    </tr>
</table>

---

## <img width={64} src="https://i.imgur.com/DTOgOBL.png" alt="Mr.DNA"/> Mr. DNA's Fun Trivia
- The achievement "Living Fossil" references the fact that horseshoe crabs have remained virtually unchanged for hundreds of millions of years!
- Mesolimulus is closely related to modern horseshoe crabs (Limulus), which are often called living fossils themselves!
- Despite being called "crabs," horseshoe crabs are more closely related to spiders and scorpions than to true crabs!

---

<Callout variant="info">
    Found an issue or have a suggestion? [Submit feedback](https://forms.gle/qpxsiVat9f6eVm2CA) • [Join Discord](https://discord.gg/3b8k78f)
</Callout>

---

## Variants

<div style={{ display: "grid", gridTemplateColumns: "repeat(auto-fill, minmax(230px, 1fr))", gap: "14px", marginTop: "12px" }}>

  <div style={{ border: "1px solid rgba(128,128,128,0.35)", borderRadius: "10px", padding: "10px", background: "rgba(128,128,128,0.06)", textAlign: "center" }}>
<Asset location="jurassic-saga:tabs/male_mesolimulus.png" width={220}/>

**Male**

  </div>

  <div style={{ border: "1px solid rgba(128,128,128,0.35)", borderRadius: "10px", padding: "10px", background: "rgba(128,128,128,0.06)", textAlign: "center" }}>
<Asset location="jurassic-saga:tabs/female_mesolimulus.png" width={220}/>

**Female**

  </div>

  <div style={{ border: "1px solid rgba(128,128,128,0.35)", borderRadius: "10px", padding: "10px", background: "rgba(128,128,128,0.06)", textAlign: "center" }}>
<Asset location="jurassic-saga:tabs/baby_mesolimulus.png" width={220}/>

**Baby**

  </div>

  <div style={{ border: "1px solid rgba(128,128,128,0.35)", borderRadius: "10px", padding: "10px", background: "rgba(128,128,128,0.06)", textAlign: "center" }}>
<Asset location="jurassic-saga:tabs/ocean_mesolimulus.png" width={220}/>

**Ocean**

  </div>

</div>