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Fig. 1 (Edelkoralle - Corallium rubrum): A mature branch shown in "natural size" (Nat. Gr.), highlighting the white star-like polyps extended from the red calcareous skeleton.Fig. 2 (Ausschlüpfende Larven): Depicts microscopic larvae (planulae) as they emerge from the parent coral, illustrating the mobile stage of coral reproduction.Fig. 3 (Zwei geöffnete Kelche): A magnified view of the red skeleton's surface, showing two empty "cups" where polyps have retracted or died.Fig. 4 (Seefeder - Pteroides griseum): Shows a portion of a Sea Pen; 'a' provides a "magnified cup" (Vergrößerter Kelch) showing the internal anatomical structure.Fig. 5 (Hornkoralle - Gorgonia verrucosa): A delicate, tree-like sea fan shown in its natural skeletal form.Fig. 6 (Vergrößerte Kelche der Hornkoralle): Magnified detail of the sea fan's surface, showing the extended polyps used for filter feeding.