Sea nut

Weight

Not recorded

Length

Not recorded

Lifespan

Not recorded

Main food

Not recorded

Habitat

Not recorded

Young per litter or clutch

Not recorded

Conservation status

Not recorded

Countries on record

Not recorded

Not recorded

No conservation assessment is recorded for this species in our sources. That is not the same as being safe: it has not been matched to an assessment.

1. kingdomAnimalia
2. phylumCtenophora
3. classTentaculata
4. orderCydippida
5. familyMertensiidae
6. genusMertensia
7. SpeciesMertensia ovum (Fabricius, 1780)

Synonyms Beroe compressa, Beroe cucullus, Beroe octoptera, Beroe ovum, Callianira compressa, Cydippe ovum, Euplokamis octoptera, Martensia octoptera, Mertensia cucullus, Mertensia groenlandica, Mertensia scoresbyi

Catalogue of Life

CompareSea nut vs Charistephane fugiens

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  Tobias, J.A. et al. (2022) AVONET: morphological, ecological and geographical data for all birds. Ecology Letters 25: 581–597. https://doi.org/10.1111/ele.13898. Data: https://doi.org/10.6084/m9.figshare.16586228.v7
• Catalogue of Life eXtended Release · CC BY 4.0 · 2026-10-16 XR
  Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf
• Wikimedia Commons · per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed) · 2026-11-11
  Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence).
• Environment Agency freshwater fish surveys (National Fish Populations Database) · OGL v3.0 · 2026-11-14
  Environment Agency. Freshwater fish surveys (NFPD). Contains public sector information licensed under the Open Government Licence v3.0. © Environment Agency copyright and/or database right. https://environment.data.gov.uk/ecology/explorer/
• EltonTraits 1.0: species-level foraging attributes of the world's birds and mammals · CC0 1.0 · 1.0
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• Global Register of Introduced and Invasive Species (GRIIS) · CC BY 4.0 · 2026-11-13
  Pagad, S., Genovesi, P., Carnevali, L., Schigel, D. & McGeoch, M.A. (2018) Introducing the Global Register of Introduced and Invasive Species. Scientific Data 5: 170202. https://doi.org/10.1038/sdata.2017.202. Country checklists published through GBIF by the IUCN SSC Invasive Species Specialist Group.
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• Wikidata · CC0 1.0 · 2026-11-11
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@misc{sea_nut_2026,
  title = {Sea nut (Mertensia ovum)},
  author = {{CreatureData}},
  year = {2026},
  url = {https://creaturedata.com/animals/sea-nut},
  note = {Data as of 2026-11-14}
}