FTB Ocean Mobs in FTB StoneBlock 4

FTB StoneBlock 4 1.23.0 ships version 21.1.4 · First seen in 1.0.0

Checked Sep 20, 2026FTB StoneBlock 4 1.23.0Sources: FTB StoneBlock 4 1.23.0 modlist.json

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FTB Ocean Mobs is a mod in FTB StoneBlock 4 1.23.0, where it is version 21.1.4. A collection of mobs & monsters that lay beneath the ocean's floor (Summary from the mod's Modrinth page.)

FTB Ocean Mobs guide for FTB StoneBlock 4

Written for FTB StoneBlock 4 1.22.0 · also fits 1.23.0 · updated Oct 17, 2026

Last verified for FTB StoneBlock 4 v1.23.0 on Oct 17, 2026 · text last changed Oct 17, 2026

Also applies to:FTB Evolution 2 1.0.2 to 1.4.0

Sections
5
Items named
3

Every recipe and number here was checked against FTB StoneBlock 4 1.23.0, read from the running game on Oct 13, 2026.

What is FTB Ocean Mobs?

This pack ships FTB Ocean Mobs at version 21.1.4, using the file ftboceanmobs-21.1.4.jar. It is part of the mod list in version 1.22.0.[1]

It isn't new either. The pack's mod list shows it was first included in version 1.0.0 or earlier, so it has been part of the pack since the early releases.[1]

Unverified What FTB Ocean Mobs adds in game (its mobs, their behavior and any settings) could not be confirmed from the material available for this guide, so none of that is described here.

How do you get started with FTB Ocean Mobs?

2 parts

There isn't a crafting-first path for this mod that I can confirm, so this section stays short. What I can tell you is what the mod adds, and the one setting this pack gives it.[2]

What the mod adds

FTB Ocean Mobs brings in a group of new mobs: the Abyssal Sludge, Abyssal Winged, Corrosive Craig, Mossback Goliath, Rift Demon, Rift Minotaur, Riftling Observer, Shadow Beast, Sludgeling and Tentacled Horror, plus a boss called The Rift Weaver.[2][3]

It also adds a few items and blocks. You'll see the Sludge Ball and the Abyssal Water Bucket, a spawn egg for each mob, and the blocks Abyssal Water, Energy Geyser and Sludge Block. There is also an enchantment called Rift Disruptor and an effect called Drowning Shadows. The language file only gives their names, so I can't tell you what they do.[2]

The one pack setting to know

The Rift Weaver boss fights inside an arena, and rift_weaver_arena_size controls how far horizontally the boss will roam from its start position. This pack sets it to 48, which is the same as the mod default. The allowed range is 16 to 128.[3]

Unverified No in-pack recipes for this mod's items were found in the sources, so there is no confirmed order of items to craft first.

How does FTB Ocean Mobs work?

5 parts

FTB Ocean Mobs is a mob mod, and its files show mobs, a few special blocks, a status effect and an enchantment rather than machines or multiblocks. Here is what the pack's files confirm about how those pieces fit together.[2][4]

Rift mobs

The mod groups its creatures in an entity type tag called rift_mobs. It contains the Riftling Observer, Abyssal Winged, Corrosive Craig, Mossback Goliath, Abyssal Sludge, Shadow Beast, Rift Minotaur, Tentacled Horror, Rift Demon, The Rift Weaver and Sludgeling.[2][4]

The Rift Weaver arena

The Rift Weaver is a boss. How far it roams horizontally from its start position is set by rift_weaver_arena_size. This pack sets it to 48, which is also the mod default, and the allowed range is 16 to 128.[3]

Tip: If you want a tighter or bigger boss fight, change the arena size in the common config. Values from 16 up to 128 are accepted.[3]

Drowning Shadows and sponges

The mod adds a status effect called Drowning Shadows. It also ships a block tag named drowning_shadows_cure, which contains Sponge and Wet Sponge.[2][5]

Seismic block tags

The mod ships block tags with seismic in their names. They show which blocks are involved, so here is what each one lists.[6][7][8]

  • seismic_smashable: sandstone, crimson planks, blackstone, cobbled deepslate, deepslate bricks and any block in the glass blocks tag.[7]
  • seismic_smashed: red sand, sand and gravel.[8]
  • seismic_cracked: crimson slab, crimson stairs, blackstone slab, cracked deepslate bricks and cracked deepslate tiles.[6]

Blocks and fluids

The mod adds Abyssal Water with an Abyssal Water Bucket, an Energy Geyser and a Sludge Block, plus a Sludge Ball item. Breaking a Sludge Block drops the block itself, as long as it survives an explosion.[2][9]

How do you progress through FTB Ocean Mobs?

2 parts

Here is the honest picture for this pack: the data I have for this mod does not lay out a tier ladder or a step-by-step progression path. I won't invent one. What follows is what the mod's own data files do confirm, which is useful to know when you run into these mobs.[4]

The rift mobs

The mod groups its hostile creatures in a single "rift mobs" tag. It contains the Riftling Observer, Abyssal Winged, Corrosive Craig, Mossback Goliath, Abyssal Sludge, Shadow Beast, Rift Minotaur, Tentacled Horror, Rift Demon, Rift Weaver and Sludgeling. The tag is just a list, so it does not tell you which of them is stronger or in what order you will meet them.[4]

Blocks and tags worth knowing

  • Sludge Block drops itself when broken, with no extra rolls or bonus drops.[9]
  • The mod has a block tag for curing "drowning shadows" that holds sponge and wet sponge. What the effect does exactly is not covered by the data I have.[5]
  • The "seismic smashable" tag covers sandstone, crimson planks, blackstone, cobbled deepslate, deepslate bricks and glass blocks.[7]
  • The "seismic smashed" tag covers sand, red sand and gravel.[8]
  • The "seismic cracked" tag covers crimson slabs and stairs, blackstone slabs, cracked deepslate bricks and cracked deepslate tiles.[6]

Unverified How the seismic block tags are used in gameplay, and how the rift mobs rank against each other, could not be confirmed from the available sources.

Which FTB Ocean Mobs config options matter?

1 part

There is only one config option for this mod in the pack's common config file, and it controls the Rift Weaver boss fight. It is the one to know if you plan to take that boss on.[3]

Rift Weaver arena size

rift_weaver_arena_size sets how far horizontally the Rift Weaver boss will roam from its start position. In other words, it is the size of the boss arena. This pack sets it to 48, which is the same as the mod default, so the pack has not changed it. The allowed range is 16 to 128.[3]

Tip: A larger value lets the boss roam further from where it starts, and a smaller one keeps it closer. If you edit the value, stay inside the 16 to 128 range the option allows.[3]

Sources

  1. FTB StoneBlock 4 1.22.0 mod list · pack file
  2. ftboceanmobs names, screen text and descriptions (English lang file) · official mod data
  3. FTB StoneBlock 4 1.22.0 config: config/ftboceanmobs-common.toml · pack file
  4. data/ftboceanmobs/tags/entity_type/rift_mobs.json (ftboceanmobs's jar) · official mod data
  5. data/ftboceanmobs/tags/block/drowning_shadows_cure.json (ftboceanmobs's jar) · official mod data
  6. data/ftboceanmobs/tags/block/seismic_cracked.json (ftboceanmobs's jar) · official mod data
  7. data/ftboceanmobs/tags/block/seismic_smashable.json (ftboceanmobs's jar) · official mod data
  8. data/ftboceanmobs/tags/block/seismic_smashed.json (ftboceanmobs's jar) · official mod data
  9. data/ftboceanmobs/loot_table/blocks/sludge_block.json (ftboceanmobs's jar) · official mod data
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 17, 2026.

Guides for other versions: 1.1.1 to 1.21.0

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Version in each release

48 releases, first in 1.0.0
FTB StoneBlock 4VersionJarWhere it came from
1.23.0
Oct 12, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.22.0
Sep 22, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.21.0
Sep 9, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.20.1
Sep 1, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.20.0
Aug 26, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.19.1
Aug 12, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.19.0
Aug 11, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.18.0
Aug 9, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.17.2
Jul 29, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.17.1
Jul 28, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.17.0
Jul 24, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.16.0
Jul 2, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.15.3
Jun 17, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.15.2
Jun 16, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.15.0
Jun 13, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.14.2
Jun 3, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.14.1
May 31, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.14.0
May 27, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.13.1
May 12, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.13.0
May 12, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.12.0
May 7, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.11.1
Apr 24, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.11.0
Apr 16, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.10.0
Apr 8, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.9.6
Apr 3, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.9.5
Apr 1, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.9.4
Mar 25, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.9.3
Mar 23, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.9.1
Mar 19, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.9.0
Mar 17, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.8.1
Mar 11, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.8.0
Feb 10, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.7.3
Feb 3, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.7.2
Feb 3, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.7.0
Jan 30, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.6.0
Jan 7, 2026
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.5.0
Dec 16, 2025
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.4.0
Dec 9, 2025
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.3.0
Dec 4, 2025
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.2.1
Nov 26, 2025
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.2.0
Nov 25, 2025
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.1.2
Nov 18, 2025
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.1.1
Nov 17, 2025
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.0.8
Nov 6, 2025
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.0.7
Nov 4, 2025
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.0.3
Nov 1, 2025
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.0.1
Oct 30, 2025
21.1.4ftboceanmobs-21.1.4.jarFrom the published release
1.0.0
Oct 29, 2025
21.1.4ftboceanmobs-21.1.4.jarFrom the published release

"From pack files" means the list came from the pack's own files; "from the published release" means ForgeBase read the jars of the release itself.

Items and blocks

15 items from the 1.23.0 recipe dump.

Config options (how FTB StoneBlock 4 sets them)

1 settings shipped in the pack's config files; 0 differ from the mod's documented default.

See all 1 settings →

Show settings
SettingFTB StoneBlock 4 valueMod default
rift_weaver_arena_size
Rift Weaver boss arena size (how far horizontally will the boss roam from its start pos
config/ftboceanmobs-common.toml
4848

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