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What is living in the water you are about to swim in
What is living in the water you are about to swim in: built per organism rather than per beach: cyanobacteria (what a bloom looks like beside pollen and…
This launch guide maps the topic, the source base and the practical questions. Check the linked official authority before acting on a rule, deadline, price or safety requirement.
What this guide covers
Built per organism rather than per beach: cyanobacteria (what a bloom looks like beside pollen and beside spilled paint, the jar test, which toxins, and why dogs die of it while people rarely do), swimmer's itch and the snail-and-duck cycle behind it, moon jelly and lion's mane in the Baltic plus the Mediterranean species holidaymakers meet, Vibrio in warm brackish water and who is genuinely at risk, leptospirosis, and the ear and eye infections a lake leaves behind.
A focused example is "Swimmer's itch: why the lake gave you spots and the sea did not."
How to use it
Use What is living in the water you are about to swim in to compare stable place facts and official facilities. Live opening, access and disruption information should always be confirmed with the operator before travel.
The page keeps the main question, its evidence base and its limits together in one canonical place. That makes it useful as a quick orientation and avoids splitting a broad subject into shallow pages before each narrower answer has enough verified material of its own.
Search vocabulary in four languages
Terminology changes across borders. These are example phrases people use for the same subject in Estonian, Finnish, Russian and English; they are included as a practical vocabulary aid, not as hidden keywords.
| Language | Example phrase |
|---|---|
| Estonian | sinivetikad järves kas võib ujuda |
| Finnish | uimarinkutina järvessä oireet |
| Russian | сине-зелёные водоросли можно ли купаться |
| English | swimmer's itch lake Baltic |
Evidence and provenance
The evidence map below records the primary, official or openly licensed material chosen for this guide. It is deliberately visible so a reader can tell the difference between a rule published by an authority, a measured dataset and an editorial explanation.
Source: SYKE's weekly cyanobacteria review and Terviseamet bathing-water notices (open), the ECDC Vibrio environmental-suitability model (open), HELCOM species lists, published cercarial-dermatitis studies. · checked 2026-09-09
Source names are preserved even where an authority changes its web address. No figure is added to this launch page unless it is already present in the cited source description or can be computed from a named dataset.
Scope and boundaries
beaches is the place and its official grade, outdoors. is the weekly regional warning; this is the organism and what it does to you.
Connected TempoLife guides
The following paths are the intentional hand-offs named in the brief. They keep adjacent subjects separate while making the next useful reference easy to find.
More Beaches
Continue to the related TempoLife reference.
More Firstaid
Continue to the related TempoLife reference.
Why it belongs on TempoLife
/more/beaches and /more/firstaid.
Frequently asked questions
What does this guide cover?
Built per organism rather than per beach: cyanobacteria (what a bloom looks like beside pollen and beside spilled paint, the jar test, which toxins, and why dogs die of it while people rarely do), swimmer's itch and the snail-and-duck cycle behind it, moon jelly and lion's mane in the Baltic plus the Mediterranean species holidaymakers meet, Vibrio in warm brackish water and who is genuinely at risk, leptospirosis, and the ear and eye infections a lake leaves behind. A focused example is "Swimmer's itch: why the…
What evidence does it use?
SYKE's weekly cyanobacteria review and Terviseamet bathing-water notices (open), the ECDC Vibrio environmental-suitability model (open), HELCOM species lists, published cercarial-dermatitis studies.
Where does this guide stop?
beaches is the place and its official grade, outdoors. is the weekly regional warning; this is the organism and what it does to you.
Turn the reference into a routine
TempoLife brings food, movement, sleep and everyday health habits into one private place when you want to track what happens next.