Yellow tube sponges get their name from their hollow, chimney-like body form. They pump huge quantities of water through their bodies, filtering out the tiny particles on which they feed. At shallow depths yellow tube sponges have a shape which resembles a cactus. In deeper waters, the sponges develop long, straight tubes. Their vivid yellow colour is probably due to special fluorescent pigments in the sponge tissue.
Key selling points
- First coin oversold
- Actual theme in nature protection
- Beautiful coins and designs
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|1/2 oz (15.5 g)
|Scope of Delivery
|Capsule, Box / Case, Certificate of Authenticity
All coins in the Coral Protection series
Find here a list of coins issued in the same series.