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The 'silent' invasion of a widespread freshwater jellyfish across Europe

Phys · · 665 words · By HUN-REN Centre
Public Scientific Literacy Citizen Science Invasive Species Management

The article discusses a study published in 'People and Nature' regarding the public's lack of awareness of the invasive freshwater jellyfish Craspedacusta sowerbii in Europe. It highlights the gap between scientific knowledge and public perception, suggesting that management strategies should incorporate citizen science to better monitor the species.

open_in_new Read the original article: https://phys.org/news/2026-05-silent-invasion-widespread-freshwater-jellyfish.ht…

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

psychologyDetected Techniques

warning
Loaded Language 70% confidence
Using words with strong emotional connotations to influence an audience.

fact_checkFact-Check Results

13 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

info Single Source 4
schedule Pending 3
check_circle Corroborated 2
help Insufficient Evidence 2
verified Verified 1
verified Verified By Reference 1
info
“A new study published in the journal People and Nature reveals a significant gap in public awareness regarding one of the world's most widespread invasive species: the freshwater jellyfish Craspedacusta sowerbii.”
SINGLE SOURCE
The provided evidence for claim 0 consists of search results for 'Canva', which are completely irrelevant to the study on Craspedacusta sowerbii.
travel_explore
web search NEUTRAL — Canva（キャンバ）は、無料で使えるオンラインのビジュアルツールキットです。 プレゼンテーション、SNSの投稿、ポスター、動画、ロゴなど、さまざまなものを作成・デザインできます。
https://www.canva.com/ja_jp/
travel_explore
web search NEUTRAL — 誰でもプロ級のデザインが簡単に作れるCanva（キャンバ）のホームページです。 誰でもプロ級のデザインが簡単に作れるCanva（キャンバ）のホームページです。
https://canva.me/japan
travel_explore
web search NEUTRAL — Mar 14, 2026 · マーケティング資料、SNS投稿、プレゼンテーションなど幅広いテンプレートが用意されています。 本記事では、Canvaの基本機能・使い方・無料版とCanva Proの料金比較・商用利用条件に加え、ビジネス・教育・個人での活用例を解説します。
https://www.ai-souken.com/article/what-is-canva
check_circle
“Despite being present on six continents and well-documented by scientists in Europe, this unnoticed (cryptic meaning "under the radar") invader remains largely unknown to the public”
CORROBORATED
Multiple independent sources (Animal Diversity Web and Research Square) confirm that Craspedacusta sowerbii is present on six continents (or 'all continents' except Antarctica).
travel_explore
web search NEUTRAL — Craspedacusta sowerbyi is a freshwater jellyfish occupying all continents, . It was first taxonomically recorded in England, in 1880. The United States did not report Craspedacusta sowerbyi until 1908…
https://animaldiversity.org/accounts/Craspedacusta_sowerbyi/
travel_explore
web search NEUTRAL — The freshwater jellyfish Craspedacusta sowerbii, likely native to China and now present on six continents, exemplifies such silent invasions.1983. Trophic relationships of the freshwater jellyfish Cra…
https://www.researchsquare.com/article/rs-7392176/v1
travel_explore
web search NEUTRAL — Synonyms and Other Names: peach blossom fish (China); Craspedacusta sowerbyi Lankester, 1880.Table last updated 4/27/2026. † Populations may not be currently present. Ecology: Craspedacusta sowerbii o…
https://nas.er.usgs.gov/queries/GreatLakes/FactSheet.aspx?Sp…
verified
“Likely native to the Yangtze River basin in China, C. sowerbii was first described outside its native range in 1880 in a London ornamental pond.”
VERIFIED
The Species Profile and Animal Diversity Web both confirm the species is indigenous to the Yangtze River valley in China and was first taxonomically recorded in England in 1880.
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https://www.justanswer.com/electronics/ap31o-add-aol-mail-sh…
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https://www.justanswer.com/email/qqhx3-can-t-find-aol-mail-w…
info
“In Europe, its presence is now established in regions ranging from Spain and Italy to Finland and Russia.”
SINGLE SOURCE
While evidence confirms the species is widespread in Europe and globally, the specific list of countries (Spain, Italy, Finland, Russia) is not explicitly confirmed in the provided evidence snippets.
travel_explore
web search NEUTRAL — Craspedacusta sowerbii yongkangensis Wang & Xu, 2004. Craspedacusta sowerbyi Lankester, 1880 [lapsus]. Limnocodium kawaii Oka, 1907.
https://en.wikipedia.org/wiki/Craspedacusta_sowerbii
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web search NEUTRAL — Craspedacusta sowerbyi is a freshwater jellyfish occupying all continents, . It was first taxonomically recorded in England, in 1880. The United States did not report Craspedacusta sowerbyi until 1908…
https://animaldiversity.org/accounts/Craspedacusta_sowerbyi/
travel_explore
web search NEUTRAL — peach blossom fish (China); Craspedacusta sowerbyi Lankester, 1880.Native Range: Craspedacusta sowerbii is indigenous to the Yangtze River valley in China, where it can be found in both the upper and …
https://nas.er.usgs.gov/queries/GreatLakes/FactSheet.aspx?Sp…
check_circle
“an international team of researchers conducted a 22-month multilingual survey across 17 European countries, collecting 1,388 responses.”
CORROBORATED
Both Mirage News and Research Square report a multilingual survey across 17 European countries with 1,388 responses. Note: One source says 22 months and another says 24 months, but the core facts of the survey size and scope are corroborated.
travel_explore
web search NEUTRAL — To assess how the public perceives this invasion, an international team of researchers conducted a 22-month multilingual survey across 17 European countries, collecting 1388 responses.
https://www.miragenews.com/freshwater-jellyfish-quietly-inva…
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web search NEUTRAL — We conducted a 24-month, multilingual online survey across 17 European countries (n = 1,388) to assess public awareness, perceptions, and management views regarding C. sowerbii.
https://www.researchsquare.com/article/rs-7392176/v1
travel_explore
web search NEUTRAL — Craspedacusta sowerbyi is a freshwater jellyfish occupying all continents, . It was first taxonomically recorded in England, in 1880. The United States did not report Craspedacusta sowerbyi until 1908…
https://animaldiversity.org/accounts/Craspedacusta_sowerbyi/
info
“More than 80% of respondents did not know the species' scientific name, and only 10% could correctly identify it as C. sowerbii.”
SINGLE SOURCE
The specific statistic that over 80% did not know the scientific name is found in one source ('The invasive freshwater jellyfish Craspedacusta sowerbii: silent...'). Other sources discuss the species but not these specific survey percentages.
travel_explore
web search NEUTRAL — Over 80% of respondents did not know the species’ scientific name, and almost half were unaware of the type of environment in which it thrives – with frequent confusion between this freshwater jellyfi…
https://www.researchsquare.com/article/rs-7392176/v1
travel_explore
web search NEUTRAL — Craspedacusta sowerbii occurs over a large range of latitudes and longitudes at the global scale (Fig. 2A) and this species is present on all continents, except Antarctica.
https://www.nature.com/articles/s41598-021-02525-3?error=coo…
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web search NEUTRAL — Identification: Craspedacusta sowerbii is a hydrozoan (Phylum Cnidaria, Class Hydrozoa), which is most easily identified when it takes the form of a small, bell-shaped jellyfish, known as a hydromedus…
https://nas.er.usgs.gov/queries/GreatLakes/FactSheet.aspx?Sp…
verified
“Nearly half of them (49%) claimed to have observed it in the sea, even though C. sowerbii is strictly a freshwater species.”
VERIFIED BY REFERENCE
Multiple authoritative sources (Animal Diversity Web, Species Profile) explicitly state that Craspedacusta sowerbii is a 'freshwater jellyfish'.
travel_explore
web search NEUTRAL — Craspedacusta sowerbyi is a freshwater jellyfish occupying all continents, . It was first taxonomically recorded in England, in 1880. The United States did not report Craspedacusta sowerbyi until 1908…
https://animaldiversity.org/accounts/Craspedacusta_sowerbyi/
travel_explore
web search NEUTRAL — The freshwater jellyfish Craspedacusta sowerbyi: a summary of its life history, ecology and distribution.1987. The first records of Craspedacusta sowerbyi Lankester for Nuevo Leon, NE of Mexico, and C…
https://nas.er.usgs.gov/queries/factsheet.aspx?SpeciesID=106…
travel_explore
web search NEUTRAL — Craspedacusta sowerbyi, or peach blossom fish or simply freshwater jellyfish, are indigenous to the Yangtze River in China and were first observed in Vermont in 1999.
https://vtinvasives.org/news-events/news/freshwater-jellyfis…
info
“Respondents generally used positive terms to describe the animal, calling it "beautiful" (21%), "sublime" (18%), and "delicate" (18%).”
SINGLE SOURCE
The provided evidence for this claim consists of search results for 'Study.com' and dictionary definitions of 'study', which are irrelevant to the survey results regarding the jellyfish.
travel_explore
web search NEUTRAL — Master any subject with Studley AI. Trusted by more than 2,000,000 top students. Create beautiful and interactive notes, flashcards, quizzes and podcasts from any content. Study smarter, not harder.
https://www.studley.ai/
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web search NEUTRAL — Take online courses on Study.com that are fun and engaging. Pass exams to earn real college credit. Research schools and degrees to further your education.
https://study.com/
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web search NEUTRAL — 5 days ago · consider, study, contemplate, weigh mean to think about in order to arrive at a judgment or decision. consider may suggest giving thought to in order to reach a suitable conclusion, opini…
https://www.merriam-webster.com/dictionary/study
help
“encountering mass occurrences of the species... triggered feelings of nervousness and caution in more than 50% of participants.”
INSUFFICIENT EVIDENCE
No evidence was provided for this claim.
help
“While 8% of respondents reported being stung, over half (56%) of those individuals reported no pain at all”
INSUFFICIENT EVIDENCE
No evidence was provided for this claim.
schedule
“The study utilized a Bayesian Network analysis to determine what factors most influence public concern and support for management.”
PENDING
schedule
“it is known to compete with fish larvae for food.”
PENDING
schedule
“Guillaume Marchessaux et al, When invasions go unnoticed: Public perception of the freshwater jellyfish Craspedacusta sowerbii in Europe, People and Nature (2026). DOI: 10.1002/pan3.70344”
PENDING
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.