FTB Ocean Mobs guide for FTB StoneBlock 4 1.1.1 to 1.21.0
FTB Ocean Mobs guide for FTB StoneBlock 4
Last verified for FTB StoneBlock 4 v1.21.0 on Oct 16, 2026 · text last changed Oct 16, 2026
A newer release (1.23.0) is out Guide for the current version
- Sections
- 4
Every recipe and number here was checked against FTB StoneBlock 4 1.21.0's own files.
What is FTB Ocean Mobs?
FTB Ocean Mobs is part of this pack's mod list. The pack ships version 21.1.4, using the file ftboceanmobs-21.1.4.jar.[1]
Unverified The sources I have only confirm that the mod is installed. They don't describe what it adds, such as which ocean mobs, how they behave or where they spawn. They also don't say who it is aimed at or where it fits in the pack's progression. I'm leaving those details out until they can be checked in game or against the mod's own files.
How do you get started with FTB Ocean Mobs?
2 parts
FTB Ocean Mobs is a mob mod, so there is no crafting ladder to climb here. What it adds is a set of creatures, a boss and a few items and blocks tied to them. This section covers what you can expect to meet.[2]
What you will run into
- Mobs: Abyssal Sludge, Abyssal Winged, Corrosive Craig, Mossback Goliath, Rift Demon, Rift Minotaur, Riftling Observer, Shadow Beast, Sludgeling and Tentacled Horror.[2]
- A boss called The Rift Weaver.[2]
- Blocks: Abyssal Water, Energy Geyser and Sludge Block.[2]
- Items: the Abyssal Water Bucket and the Sludge Ball, plus a spawn egg for each of the mobs above, including the boss.[2]
- Extras: the Drowning Shadows effect and the Rift Disruptor enchantment.[2]
The Rift Weaver arena
The one setting this pack gives you for the mod is rift_weaver_arena_size. It controls how far horizontally the Rift Weaver will roam from its start position. In this pack it is 48, the same as the mod default, and it can be set anywhere from 16 to 128.[3]
How does FTB Ocean Mobs work?
1 part
The only core mechanic for FTB Ocean Mobs that the pack's files confirm is the arena size of the Rift Weaver boss. I can't show you machines, multiblocks, power, fluids or item automation for this mod, so this section stays short.[3]
Rift Weaver boss arena
The Rift Weaver is a boss, and its arena size sets how far horizontally it will roam from its start position. You control this with rift_weaver_arena_size.[3]
Which FTB Ocean Mobs config options matter?
1 part
FTB Ocean Mobs keeps things simple: the only option the sources confirm for this pack is the Rift Weaver boss arena size, in the common config file.[3]
Rift Weaver arena size
rift_weaver_arena_size controls how far horizontally the Rift Weaver boss will roam from its starting position. In practice, it sets how big the fight area is. The valid range is 16 to 128.[3]
This pack sets it to 48, which is the same as the mod default, so the pack did not change this value.[3]
Unverified No other options from this mod's config were provided, so any other settings and whether the pack changed them are unverified.
Sources
- FTB StoneBlock 4 1.21.0 mod list · pack file
- ftboceanmobs names, screen text and descriptions (English lang file) · official mod data
- FTB StoneBlock 4 1.21.0 config: config/ftboceanmobs-common.toml · pack file
Where this guide comes from
Written from what FTB StoneBlock 4 itself ships: its files and recipes, the in-game guidebooks and the mods' own pages. Every statement links to the source it came from, and the numbers are checked against the pack before publishing.
Guide last verified Oct 16, 2026.
Guides for other versions: 1.22.0 to 1.23.0