01.The four main images
All four are bootc OCI images with live ISOs, and all four ship GNOME, KDE Plasma, COSMIC and Niri.
Albacore
Start here10-year support cycle. The rock-solid daily driver for work.
GNOME · KDE Plasma · COSMIC · Niri
Yellowfin
Newer packages on a near-enterprise base. The developer pick.
GNOME · KDE Plasma · COSMIC · Niri
Skipjack
Upstream-tracking — a preview of where Enterprise Linux is headed.
GNOME · KDE Plasma · COSMIC · Niri
Bonito
Bleeding-edge packages and the very latest kernel.
GNOME · KDE Plasma · COSMIC · Niri · XFCE
02.Other bases
The same desktop layer on other distributions, plus rolling-release siblings. These are separate from the BuildStream projects listed below.
GurnardUbuntu 24.04Ubuntu 24.04 LTS with the Pantheon desktop.
GrouperUbuntu 26.04The Ubuntu you know, rebuilt as an immutable bootc image.
HummingbirdFedora HummingbirdContainer-native Fedora Hummingbird, hardened for secure boot.
RedfinRHEL 10Secure enterprise workspace. Local-build only.local build only
MarlinArch LinuxRolling release base with absolute latest packages.
FlounderDebian 13 TrixieStable Debian base with containerized package delivery.
Flounder SidDebian SidRolling Debian development base.
Bonito RawhideFedora RawhideFedora Rawhide upstream development base.
SailfinopenSUSE TumbleweedopenSUSE Tumbleweed rolling package base.
GuppyGentoo LinuxSource-based Gentoo packages compiled on immutable layers.03.BuildStream variants
Independent TunaOS image projects with their own build graphs. Athens is experimental and local-only; Tromsø and Brussels declare OCI image references.
| Image | Base runtime | Desktop | Build output | Stage |
|---|---|---|---|---|
 AthensBuildStream | GNOME OS OCI runtime | Pantheon | oci/athens.bstLocal-only target · no public image | Experimental |
 TromsøBuildStream | freedesktop-sdk | KDE Plasma 6 | ghcr.io/tuna-os/tromso:latest | Alpha |
 BrusselsBuildStream | freedesktop-sdk | Xfce Wayland | ghcr.io/tuna-os/xfce-linux:latest | Alpha |