Plant · GBIF taxon 4267628
Bull Kelp
Nereocystis luetkeanaAlso known as Bullwhip Kelp, Ribbon Kelp
Bull kelp grows rapidly from subtidal rocks to the ocean surface each year, anchored by a fibrous holdfast and elevated by a hollow gas bladder. Long ribbon-like fronds spread across the sunny water surface, creating dense underwater forests that shelter fish, marine mammals, and invertebrates. After winter storms break stipes from their rocky anchors, large tangles of kelp drift ashore in dramatic whip-like coils.
MarineMacroalgaKelp Forest
—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Diet & prey
- Autotrophic (photosynthesis)
Predators
- Purple Sea Urchin
- Red Sea Urchin
- Kelp Crab
ThreatsMarine heatwaves, urchin overgrazing, ocean warming
HabitatsSubtidal rocky coasts and cold temperate reefs
Life span1 year
Size / weightNot available
Classification
- OrderLaminariales
- FamilyLaminariaceae
- GenusNereocystis
- SpeciesNereocystis luetkeana
Range data is not available yet.
Interaction riskLow
- Low
- Moderate
- High
- Very high
- Why interaction risk is low
- Safe to observe at a normal distance.
- What to notice
- Recognizable by a single hollow bulbous float anchored by a long whip-like stipe ending in broad fronds.
- Support conservation
- Avoid anchoring boats directly inside kelp beds and refrain from harvesting wild holdfasts.
Responsible observation
- Beachcombing: Search rocky drift lines after winter storms to examine washed-up gas bladders and stipes.
- Kayaking: Navigate around floating canopy beds carefully to prevent paddle entanglement in surface fronds.
Competitor "Giant kelp (Macrocystis pyrifera), Monterey Bay aquarium, California" by LT&C is licensed under CC BY 2.0. To view a copy of this license, visit https://creativecommons.org/licenses/by/2.0/. · cc-by
Herbivore (c) Jerry Kirkhart, some rights reserved (CC BY) · cc-by
Ecological Protector Marshal Hedin from San Diego / CC BY-SA 2.0 · cc-by-sa
Close Relative (c) Cwmhiraeth, some rights reserved (CC BY-SA) · cc-by-sa
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Found in Collections
Ecosystem chain
Wetland Territory
Bull Kelp is found in this collection. Identify it in Fauna to fill this slot and continue your progress.
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