Craft a scene within a medieval castle's great hall, where knights gather around a massive round table, discussing matters of chivalry and honor.

Glowing bioluminescent organisms in a dark ocean.

Misty marshlands teeming with unique plant and bird life.

A family of dolphins leaping in unison across ocean waves.

Medieval castle on a misty hill, surrounded by a moat, with knights on horseback, a bustling courtyard, and distant mountains.