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Grape Caulerpa
Caulerpa racemosa
Also known as Sea Grapes, Green Grape Algae
Plantae›Chlorophyta›Ulvophyceae›Bryopsidales›Caulerpaceae
📍 Worldwide in tropical seas and Mediterranean
Creeping runners bearing upright branches tipped with small spherical beads — resembling tiny bunches of grapes. One of the most vigorous nutrient-exporting macroalgae; grows rapidly in refugia. Can go sexual and crash if left unharvested for too long. Listed as invasive in the Mediterranean.
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Quick Facts
- role
- beneficial — refugium
- warning
- harvest frequently to prevent going sexual; invasive in some regions
- placement
- sump refugium
- lightLevel
- medium
Water it likes
- ph
- 8.0–8.4
- hardness
- 8–12 dGH
- temperature
- 68–81°F (20–27°C)
Legality
No state or federal restrictions on record for this species.
Not legal advice, and possibly incomplete or out of date. Rules vary by state and locality and change over time — always confirm the current regulations with your state wildlife or agriculture agency before buying, keeping, or shipping this species.