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    2,055,424 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 25 Oct 2026.636,163 files with their code readFiles whose code we turned back into readable code and read, in an isolated environment. Counted on 25 Oct 2026.269,392 projects gradedProjects with a letter from A to F. Counted on 25 Oct 2026.
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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    Prehistoric seacreatures

    Mod

    Add prehistoric sea creatures and new gear to your world.

    D63/ 100
    • OverviewD
    • SecurityPassed
    • PrivacyNone found
    • AIAI images
    • CompatibilityMinecraft 1.20.1
    • ModpacksIn 12
    • ReleasesLatest 6 Mar

    Download

    prehistoric_seacreatures-1.7.0-forge-1.20.1.jar

    Released 6 Mar 2026 · 4.2 MB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade D

    How grades work

    Strengths

    • Security checks passed
    • Stable releases

    Points lost

    • No source code link−7 points
    • No release in 8 months−6 points
    • First release only 9 months ago−5 points
    • Releases in only 3 of the last 24 months−4 points
    • No public issue tracker−3 points
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      10 points lost17 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.8 months ago (6 Mar 2026) 6 / 12
      Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.1.20.1 on Forge. 15% or more of the popular mods updated in the last 6 months also have files for 1.20.1. Latest Minecraft: 26.3. 9 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 3 of the last 24 months 2 / 6

    • Stability

      Full points22 / 22
      Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.1 of the 9 modpacks with two or more versions removed it in a later one (11%) 10 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.1 of its 13 releases in 2 years needed a quick fix (8%) 7 / 7
      Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.None 5 / 5

    • Transparency

      10 points lost0 / 10
      Source codeWhether the project page links to its source code, so anyone can read what it does.No link on the project page 0 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.No link to report problems 0 / 3

    • Popularity

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.15,252 3 / 4

    • Track record

      5 points lost3 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.9 months, 10 releases 3 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in the latest file for recent Minecraft versions. See Security
    Total63 / 100

    44.5 of the 71 points that apply = 63 out of 100. The points above are rounded to whole numbers.

    Images

    • dunkleosteuspickture.png
    • Ludde (1)picture.png
    • Jaekelopteruspicture.png
    • sacabambaspispicture.png
    • trilobitemodelpicture2.png
    • ichthyosaurus picture(1).png
    • brygmophyseternicepic.png
    • Seal (1) screenshotpicture.png
    • Orthoceraspicture.png

    About

    Prehistoric Seacreatures adds prehistoric marine and freshwater animals to Minecraft, along with craftable weapons, tools, food, and armor. Its creatures include the defensive Liopleurodon, which drops teeth for a bleeding serrated blade; the aggressive Dunkleosteus, which hunts players and smaller fish; and the ocean-floor Trilobite and river-dwelling Jaekelopterus, whose shell and claw can be turned into protective gear and weapons. Other additions include the Sacabambaspis, which can nab players before fleeing and provides meat when killed, and the Orthoceras, whose shell crafts into arrows that shatter underwater to damage nearby creatures or yield a recoverable fragment when they hit a block. The mod also adds schools of Ichthyosaurus that defend one another when attacked and can be tamed with Sacabambaspis meat, plus the whale-like Brygmophyseter, tamed with Desmatophoca meat; both can be saddled and ridden. Dunkleosteus dermal plates craft into an armor set that improves underwater movement and allows underwater breathing, while Desmatophoca meat also serves as food for taming the Brygmophyseter.

    Written from Modrinth . How we write it

    In-game changes

    Does not change the game's code directly.

    Adds 32 items, 9 mobs, 17 recipes, 1 advancement, 5 loot tables, 5 sounds and 1 key binding.

    Counted from the names and data files in the mod, so the list may not be complete.

    Keeps all of vanilla Minecraft's textures, models and sounds.

    Details

    Creator
    vidartuff
    License
    All rights reserved
    Downloads
    15K
    Created
    25 Jan 2026
    Official pages
    Modrinth , CurseForge
    Links
    Discord

    Security

    No harmful code found

    We checked its files and read their code, without running it.

    Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.

    How we checked · The latest file checked, last on 16 Oct 2026
    • FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.
      1 latest file, for a recent version. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
    • Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.
      Read without running it
    • Author on ModrinthThe disclosure form on Modrinth, where the author declares that the project reads or edits things on your system outside the game. Since 13 Aug 2026, Modrinth's rules require it when this applies.
      Nothing declared about your system outside the game.
    • Looked for, not foundWe looked for these in the file and did not find them.
      The internet, folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.

    Privacy

    We found nothing it sends

    We read its code without running it: it contacts no web address while you play.

    Why we show this: a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.

    How we checked · Its one file read
    • Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.
      The code of its one file, for recent Minecraft versions. See each file in Releases
    • Author on ModrinthThe disclosure form on Modrinth, where the author declares crash reports, usage data and advertisements. Since 13 Aug 2026, Modrinth's rules require it when a project collects data on its users or shows advertisements.
      Nothing declared about crash reports, usage data or advertisements.

    AI

    AI was used for its images

    ChatGPT is named in the images in its files.

    No sign of AI in the game

    We found no AI service, AI library or AI model file in its code.

    Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.

    How we checked · 6 places read
    • Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.
      No AI content or AI features declared.
    • Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.
      Nothing found
      3 of 23 changelogs read
    • Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.
      Nothing found
    • Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.
      An image names ChatGPT in its image metadata orth_shell.png
    • Sounds in its filesThe tags of the sound files in the files you download, where some AI music tools write their name.
      Nothing found
      5 sounds read
    • Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.
      No AI service, AI library or AI model file
      146 code files read

    Compatibility

    See all 10 files
    Forge
    1.201.2126.126.3

    Point at or tap a version to see its loaders.

    Runs onWhere to install it: in your game, on the server, or both. As the author says on Modrinth.Needed in your game and on the server, or you cannot join.
    RequiresProjects you must also install for it to work. From the author's lists for its files for recent Minecraft versions, or from its project page.Nothing
    OptionalProjects it can work with but does not need. The author lists them.Nothing
    IncludesProjects packed inside its files.Nothing
    Speed of updatesHow fast it gets a file for new Minecraft versions, on average, compared with similar projects. Not part of the grade.It has no file for Minecraft versions newer than 1.20.1. Many recently updated mods still support 1.20.1.

    Modpacks using this project

    Find modpacks with it

    Modpacks that include Prehistoric seacreatures in at least one of their versions, most downloaded first.

    ModpackDownloadsLast version with it
    Create - Water Worse Than Lava [ALPHA]755 downloadslast version with it 16 May 2026Abandoned Lighthouse 100 Days602 downloadslast version with it 2 Jul 2026center of the earth - hollow earth460 downloadslast version with it 7 Aug 2026Mesozoa: Dinosaur Fantasy225 downloadslast version with it 25 Sep 2026The Shattered Frontier199 downloadslast version with it 22 Sep 2026Daydaloss Souls181 downloadslast version with it 17 Mar 2026Vivirocity99 downloadslast version with it 20 Oct 2026Gbtapp1's Prehistoric Realm59 downloadslast version with it 10 Feb 2026GJAAMJust Guns And Alot More57 downloadslast version with it 15 Oct 2026Primeval Earth46 downloadslast version with it 10 Sep 2026
    1 to 10 of 1212

    Latest files

    The newest file for each Minecraft version and loader. The files for recent versions come first. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.

    MinecraftLoaderVersionSecuritySendsRequires
    1.20.1·Forge1.7.01.7.0 · prehistoric_seacreatures-1.7.0-forge-1.20.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    10 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.20.1The latest file for its Minecraft version and loader·Forge1.7.01.7.0 · prehistoric_seacreatures-1.7.0-forge-1.20.1.jar (main file)·6 Mar 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 4.2 MB
    1.20.1·Forge1.6.11.6.1 · prehistoric_seacreatures-1.6.1-forge-1.20.1.jar (main file)·21 Feb 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 2.8 MB
    1.20.1·Forge1.6.01.6.0 · prehistoric_seacreatures-1.6.0-forge-1.20.1.jar (main file)·17 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 2.8 MB
    1.20.1·Forge1.5.01.5.0 · prehistoric_seacreatures-1.5.0-forge-1.20.1.jar (main file)·12 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 312.8 KB
    1.20.1·Forge1.4.01.4.0 · prehistoric_seacreatures-1.4.0-forge-1.20.1.jar·2 Feb 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 250.0 KB
    1.20.1·Forge1.3.01.3.0 · prehistoric_seacreatures-1.3.0-forge-1.20.1.jar·1 Feb 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 200.0 KB
    1.20.1·Forge1.2.01.2.0 · prehistoric_seacreatures-1.2.0-forge-1.20.1.jar·30 Jan 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 150.2 KB
    1.20.1·Forge1.1.11.1.1 · prehistoric_seacreatures-1.1.1-forge-1.20.1.jar·26 Jan 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 125.7 KB
    1.20.1·Forge1.1.01.1.0 · prehistoric_seacreatures-1.1.0-forge-1.20.1.jar·26 Jan 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 125.7 KB
    1.20.1·Forge1.0.01.0.0 · prehistoric_seacreatures-1.0.0-forge-1.20.1.jar·25 Jan 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 89.8 KB

    Quick fixes

    In the last 2 years, 1 release needed a quick fix: a new release within 3 days to fix a problem. This counts in the grade, but it is too few to lose points.

    See them, newest first

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.1

    • 1.1.1-forge-1.20.126 Jan 2026