Responsible fishkeeping: welfare, transport and species rules

OneShoal.com exists to make responsible aquatic keeping, rehoming and trading easier — not simply to create more transactions.

Responsible Fishkeeping & Selling

A community guide to keeping, describing, moving and rehoming aquatic life well.

Adult size, not the size in the photo. Many aquatic animals are sold as juveniles.
The water environment they need: freshwater, brackish, marine or pond, and the temperature and chemistry range they tolerate.
Social needs: whether they must be kept in a group, in pairs, or alone.
Behaviour: territorial, predatory, fin-nipping, digging or plant-eating tendencies.
Feeding: what they actually eat, how often, and whether you can source it.
Tank or pond size, filtration and long-term commitment — some species live for decades.

Species or, where you are not certain, the closest honest description.
Quantity, current size and condition, and anything a new keeper should know.
Known relevant issues: past illness, ongoing treatment, deformity, aggression or unusual behaviour.
Actual availability — do not advertise animals you no longer have.
Avoid misleading stock imagery. Where an example photo is used, label it clearly as an example.

Compatibility tools reduce obvious errors: mismatched water requirements, adult sizes, temperament and group needs.
They cannot predict every individual animal's behaviour, your aquascape or the order you introduce stock.
A positive result is guidance, not a guarantee. Watch behaviour closely after any new introduction.

Use suitable, secure containers with enough water and air for the journey.
Manage temperature sensibly for the conditions on the day, and keep the container stable and out of direct sun.
Keep journeys as short as reasonably possible and avoid unnecessary handling.
Where you can, prepare the receiving tank or pond before you collect.

Follow suitable quarantine and acclimation practices based on the species, its health status and expert guidance.
No single method suits every aquatic animal — freshwater, marine and pond livestock all differ.
If you are unsure, ask the seller what they did, and take advice from a professional or an experienced keeper before mixing stock.

Never release aquarium or pond livestock, plants or other aquatic organisms into the wild unless specifically authorised by the relevant authority.
That includes water, substrate and plant fragments entering shared drainage or a watercourse.
If you can no longer keep an animal, rehome it through a keeper, a shop or a rescue instead.

Species restrictions, business licences, consumer obligations and animal-welfare rules vary by country, state, region and local authority.
You remain responsible for complying with the requirements that apply to you, whether you are buying, selling or moving livestock.
If you are not sure whether something is permitted, check with your local authority before you list, buy or transport.

Identify yourself honestly as a business, and keep your legal details current.
Hold and maintain any licences or registrations required where you operate.
Comply with the consumer rules that apply to your sales.
Comply with restricted, protected and invasive species rules.
Trade livestock responsibly: sound sourcing, honest descriptions and welfare-appropriate handling.

Circumstances change — moving, illness, cost or simply an animal outgrowing its home.
Rehoming is a good outcome. Abandonment and release are not.
Ask where an animal is going and whether the tank or pond genuinely suits it. It is fine to decline a sale.