# Cycle StarFish (Archived)

## **Introdction:**

StarFish is the first testnet of Cycle launched on Jan 25 2024. The purpose of launching startfish is to verify the Feasibility of Cycle's Multi-Chain Rollup Mechanism in Practical Applications. By now, Starfish has supported many Mainstream Ethereum Ecosystem Networks and Bitcoin Layer 2 Solutions.

## **Network:**

Cycle

| **ChainId** | **chainName**  | **Currency** | **NetworkId** |
| ----------- | -------------- | ------------ | ------------- |
| 1221        | Cycle StarFish | ETH          | 1             |

Security Layer

| **ChainId** | **chainName** | **Currency** | **NetworkId** |
| ----------- | ------------- | ------------ | ------------- |
| 11155111    | Sepolia       | ETH          | 0             |

Extend Layer

| **ChainId** | **chainName**                        | **NetworkId** |
| ----------- | ------------------------------------ | ------------- |
| 97          | BNB Smart Chain Testnet (deprecated) | <p><br></p>   |
| 5611        | opBNB Testnet                        | 6             |
| 421614      | Arbitrum Sepolia                     | 4             |
| 11155420    | op-sepolia                           | 5             |
| 59141       | Linea Sepolia (incoming)             | <p><br></p>   |
| 84532       | Base Sepolia Testnet (incoming)      | <p><br></p>   |
| 80085       | Berachain Artio (incoming)           | <p><br></p>   |
| 11503       | BEVM Testnet                         | 10            |
| 195         | X Layer Testnet                      | 9             |
| 4690        | IoTeX Network Testnet (deprecated)   | <p><br></p>   |
| 80002       | Polygon(Amoy) （deprecated）           | <p><br></p>   |

{% hint style="info" %}
Attention: Testnet is not suitable for long-term data storage as data will be periodically reset.
{% endhint %}