




A fossilized clam is a shell from a clam that lived a long time ago. It helps us learn about ocean life in the past!
The Fossilized Clam is typically a grey, tan, or brown stony impression of a bivalve shell. It features distinct concentric growth lines and a symmetrical, often oval or rounded shape, visibly different from fossilized snails which have a coiled structure.





カテゴリ
Ancientレア度
Common
危険度
1/5 · 非常に低い
スナップ
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Ancient clam shells can sometimes be found filled with dazzling mineral crystals inside!
Clams grow new shell layers yearly, like tree rings, showing their age and environment.
Giant clams can grow over a meter wide and weigh more than a small car!
Some fossilized clams are over 500 million years old, found on ancient seabeds!
Fossilized Clam has preserved its history in stone that helps scientists understand Earth's past ecosystems.
Fossilized Clam can protect itself with a sturdy, calcium carbonate shell because of its hard, protective layers.
Fossilized Clam can burrow into soft sediment that helps them hide from predators and anchor securely.
Fossilized Clam has the ability to filter feed that helps them strain tiny particles from the water.
Tiny filter-feeders, clams strain plankton and organic bits from water.
Plesiosaurus dolichodeirus
Ancient marine reptiles often preyed on shelled invertebrates.
Emiliania huxleyi
Filter-feeding clams strained these microscopic algae from ancient waters.

Zostera marina
Ancient clam beds often thrived in seagrass meadows for shelter.
まだ別名はありません。
危険度
1/5 · 非常に低い
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0.05-0.2 m
0.05-1 kg
Tiny filter-feeders, clams strain plankton and organic bits from water.
Filter Feeding
Cretaceous Period
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