In Crustacean Craft you can explore the arcane arts with Thaumcraft, Blood Magic, and Botania while creating futuristic technologies with Mekanism, Thermal Expansion, Industrialcraft, and many other mods. While studying magical radiation from EssentialCraft 3, why not explore the Twilight Forest, an updated End dimension with Hardcore ender expansion, and even other planets with Advanced Rocketry?

If when attempting to load the modpack, you get this error:
Failed to download file, the file contents differ from what was expected.
Name: jopt-simple-4.5.jar
URL: https://libraries.minecraft.net/net/sf/jopt-simple/jopt-simple/4.5/jopt-simple-4.5.jar
Filename on disk: jopt-simple-4.5.jar
Path: /Users/danielpeto/Library/Application Support/minecraft/libraries/net/sf/jopt-simple/jopt-simple/4.5/jopt-simple-4.5.jar
Exists: File

Follow these steps:
1.) Exit out of your Minecraft Launcher
2.) Download the "jopt-simple-4.5.jar" file from https://libraries.minecraft.net/net/sf/jopt-simple/jopt-simple/4.5/jopt-simple-4.5.jar
3.) Open the folder your Minecraft is installed in (This can be found in the Minecraft tab of the settings in your Twitch Launcher)

4.) Open the following folders in your Minecraft installation in order: Install, libraries, net, sf, jopt-simple, jopt-simple, 4.5
5.) Replace the "jopt-simple-4.5.jar" file in the 4.5 folder with the file you downloaded in step 2