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Sea Lettuce
Ulva lactuca
Family: Ulvaceae
📍 Worldwide — intertidal and subtidal zones
Bright green, tissue-thin sheets of macroalgae familiar on coastlines worldwide. Fast-growing nutrient exporter and a relished food for tangs, urchins, and rabbitfish. Tolerates a very wide temperature and salinity range. Can become weedy if not harvested — keep export-focused.
Keeping this species
- flow
- moderate
- note
- excellent herbivore food; harvest frequently to export nutrients
- role
- beneficial — food and nutrient export
- lightLevel
- medium to high
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Natural Habitat Temperature
59°F — 72°F seasonal range · (Jan low, Jul high)