Jellyfish & Corals
Stinging cells · ocean drifters & reef builders
Jellyfish, sea anemones, and corals belong to a group called cnidarians. They have soft bodies and special stinging cells.
What makes them this type?
- Stinging cells (cnidocytes)
- Soft, simple body plans
- Many are radial (round symmetry)
- Ocean habitats
- Corals build reefs with tiny animal colonies
Examples
Moon jelly Gentle-looking ocean drifter
Box jellyfish Powerful sting — respect from shore
Sea anemone Clownfish partner
Coral polyp Builds entire reefs
Portuguese man o’ war Colony, not one animal
Hydra Tiny freshwater relative
Motion Notes (for Animation & Drawing)
- Bell pulse: expand → contract → glide
- Tentacles trail and lag behind the bell (secondary motion)
- Corals are mostly still with tiny polyp waves
Learn More
Coral reefs are built by millions of tiny animals working with algae. They are among Earth’s richest habitats.
Jellyfish are mostly water. They have no brain like ours, but they still sense light and balance.
Animators use jelly motion to practice overlapping action and soft-body timing.
Fun Facts
- Some jellyfish can glow (bioluminescence).
- Coral reefs support about a quarter of ocean species.
- A “bloom” of jellyfish can cover huge areas of sea.