Hardcore Squid Mode Addon
Hardcore Squid Mode Addon — this modification allows you to experience life as a squid living underwater.
Once you install the Hardcore Squid Mode, you’ll gain the ability to breathe underwater, but once you step onto land, your “air” supply will start depleting. Therefore, you’ll need to stay submerged at all times and say goodbye to dry land, although there is a solution!) — it’s detailed at the end of this post!
The Hardcore Squid Mode addon introduces an added layer of survival challenge in the world of Minecraft PE, enhancing your survival skills within the game.
This mod enables you to live like a squid. After acquiring squid-like traits, you can remain above water for about 25 seconds before needing to gasp for air and potentially suffocate. 
Now, your only safe breathing space is underwater. As shown in the screenshot below, there are no breathing bubbles above your health bar because water is where you feel most comfortable and secure.
Choosing an aquatic lifestyle makes survival in Minecraft PE significantly easier since hostile mobs cannot reach you due to their inability to swim. This forces you to stay near the water’s surface while remaining safely submerged in your new habitat.
The Hardcore Squid Mode addon ensures a challenging survival experience in the realm of Minecraft Pocket Edition. If you’re looking for a ready-made squid world, you can download a map designed specifically for this addon, complete with a house built with water elements for underwater survival!