Floating Squids reference?

I loaded up a new world and teleport to the nearest trial chamber after using the locate structure command. When I got teleported, I went into spectator to look around the generated trial chamber underneath the ocean sand. To my surprise, my eye catches a glimpse on what I initially thought was the return of floating squids, ended up being the successor, floating glowing lichens.

What I did to get this:

• Load up Preview 1.21.0.21 and create a new world with the experimental toggles on.
• load a world with the seed ‘7019082579181945631’
• After spawning in, do the locate structure command and locate trial chamber and teleport there.
• teleport to ‘16.50, 90.00, 144.50’
• Spectatpr mode around the trail chamber until you find the issue.