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Fossilized Sea Urchin
ExploreAncient
Fossilized Sea Urchin
A fossilized sea urchin is a small, spiky creature from the ocean that turned into stone. They are fun to find on the beach!
Appearance
The Fossilized Sea Urchin is typically a rounded or oval shape, often flattened, showing distinct radial symmetry. It appears in muted shades of grey, brown, or cream, revealing the intricate patterns of its calcified shell (test) and sometimes spine attachment points.
KingdomAnimalia
Category
AncientRarity
Common
Danger
1/5 · Very low
Snaps
Be the first to snap!
Interesting facts
Early humans sometimes wore fossil sea urchins as good luck charms!
Finding one means you're touching something truly millions of years old!
Some fossil urchins still show where their sharp spines once attached!
They're ancient cousins to modern starfish and sand dollars!
Special abilities
Ability
Time Capsule
Fossilized Sea Urchin can preserve its ancient details because its rock layers act like a natural time capsule, holding clues for millions of years.
Ability
Ocean Architect
Fossilized Sea Urchin has a rigid, intricate skeletal structure that helps scientists understand how ancient ocean creatures were built.
Ability
Paleo-Clue
Fossilized Sea Urchin can indicate ancient warm, shallow seas because their presence often points to specific prehistoric marine conditions.
Measurements & details
- Estimated Length
- 0.03-0.15 m
- Estimated Weight
- 0.1-0.5 kg
- Era
- Mesozoic Era (Cretaceous Period)
Diet & Feeding
Ancient sea urchins grazed on algae and detritus from the seafloor.
Primary Foods
- Algae
- Seaweed
- Detritus
- Microorganisms
Foraging Method
- Grazing
Ecological connections
eaten by
Ptychodus Shark
Ptychodus mortoni
Powerful-jawed sharks crushed the shells of ancient sea urchins.
eaten by
Crow Shark
Squalicorax pristodontus
These ancient sharks were opportunistic predators of sea life.
eats
Coralline Algae
Goniolithon catellatum
Grazed on ancient coralline algae growing on the seafloor.
Traits
Ancient
Ancient refers to organisms, objects, or geological formations that have existed for an extremely long period.
Artifact
An artifact is an object made or modified by human culture, typically of historical or archaeological interest.
Fossil
A fossil is the preserved remains or traces of an ancient organism embedded in rock or other geological deposits.
Also known as
Echinoid FossilSea Urchin Fossil
Collections
Safety
Danger
1/5 · Very low
Explore with care and ask an adult if you're unsure what to do.
Frequently Asked Questions
How long is Fossilized Sea Urchin?
0.03-0.15 m
How much does Fossilized Sea Urchin weigh?
0.1-0.5 kg
What does Fossilized Sea Urchin eat?
Ancient sea urchins grazed on algae and detritus from the seafloor.
How does Fossilized Sea Urchin hunt?
Grazing
What geologic era did Fossilized Sea Urchin live in?
Mesozoic Era (Cretaceous Period)
Snap Map
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