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One deterministic finder reaches practical guidance, tank-side first decisions, bounded definitions, recurring claims, reviewed studies, supporting authorities, named uncertainty, reproducible searches and public corrections. It retrieves existing records and never generates a care answer.
Result type is part of the answer boundary. A guide gives practical direction. A glossary term standardizes wording. An evidence record describes a study. An authority governs a method or external rule. A gap states uncertainty. A search documents method. A change records history. None silently becomes another type.
45 records found
Scientific name
A taxonomic claim such as Neocaridina davidi.
Boundary: Its strength depends on the identification method and taxonomic treatment, not on italic type or seller confidence.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Common name
A public label such as cherry shrimp that helps people communicate.
Boundary: It does not uniquely establish species, ancestry or grade.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Trade line or morph
A commercial or breeder label for an appearance-associated population.
Boundary: It is not a formal taxonomic rank, genotype, pedigree or guarantee that two sellers share ancestry.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Line
A breeding population maintained with a stated source history, objective and records.
Boundary: A name alone does not prove that history.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Grade
An observed appearance classification under a named standard, method and date.
Boundary: Grade is not species, health, genetic purity or breeding value.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Phenotype
An observed trait or set of traits produced by genotype, development and environment.
Boundary: Similar appearance does not prove the same genotype.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Genotype
The genetic state at defined loci or across defined sequence data.
Boundary: It cannot be assigned from colour unless a validated phenotype-genotype method exists for that exact claim.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Provenance
The documented source, custody and transfer history of animals or a colony.
Boundary: Provenance records a claim trail; it does not independently verify every earlier claim.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Colony
A population maintained in a defined system.
Boundary: A colony is not automatically a pure line, family or genetically isolated population.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Carapace
The hard dorsal and lateral covering of the cephalothorax.
Boundary: Carapace length is not total body length; a measurement must state its landmarks.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Rostrum
The forward-projecting part of the carapace between and ahead of the eyes.
Boundary: Shape and teeth may inform taxonomy, but one rostrum photograph rarely resolves species by itself.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Pereiopod
One of the thoracic appendages used in feeding or walking.
Boundary: The first, second, third and later pereiopods have different structures and cannot be called simply a leg when location matters.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Pleopod
One of the paired appendages under the abdomen, often called swimmerets.
Boundary: Male pleopod structures can be taxonomically important and usually require an appropriate adult view.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Saddle
Hobby shorthand for a visible ovary or developing oocytes through the carapace.
Boundary: It supports ovarian development; it does not prove mating, fertilization or a future hatch.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Ovigerous or berried
Carrying eggs attached beneath the abdomen.
Boundary: It does not by itself prove that the eggs are fertilized, viable or certain to hatch.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Clutch
The eggs associated with one reproductive event.
Boundary: Count attached eggs, hatched young and retained juveniles separately because they have different denominators.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Exuvia
The shed exoskeleton left after ecdysis.
Boundary: It is not a carcass, and seeing one does not establish whether the animal completed the molt without later problems.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Molt
The shedding event or, informally, the shed exoskeleton.
Boundary: State whether you mean the process, a live animal during ecdysis or an exuvia.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Shrimplet
An informal hobby term for a small young shrimp.
Boundary: It is not a standardized developmental stage; use hatch date, body measurement and anatomical stage when precision matters.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
GH
General hardness, a method-defined measure mainly responding to dissolved calcium and magnesium.
Boundary: GH does not reveal the separate calcium and magnesium concentrations or every dissolved mineral.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
KH or alkalinity
Hobby KH tests approximate acid-neutralizing capacity, commonly expressed as carbonate hardness.
Boundary: The result is not a direct inventory of carbonate species and is not interchangeable with pH.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Conductivity
How well the water conducts electricity under a stated method and temperature basis.
Boundary: It responds to dissolved ions but does not identify them.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
TDS
Total dissolved solids; many hobby meters estimate it from conductivity using a conversion factor.
Boundary: The display does not reveal composition, GH or a species requirement.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
pH
A logarithmic measure related to hydrogen-ion activity.
Boundary: Record the method, time and temperature; one reading does not establish the daily range or buffering capacity.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Total ammonia
The combined ammonium and unionized-ammonia result under the method used.
Boundary: Preserve whether it is reported as nitrogen or as the chemical species.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Unionized ammonia, NH3
The unionized fraction of total ammonia.
Boundary: Its fraction changes with pH and temperature, so NH3 and total ammonia are not interchangeable numbers.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Nitrite and nitrate
Different oxidized nitrogen analytes.
Boundary: Preserve whether each result is reported as nitrogen or as the whole ion before comparing values.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Not detected
No signal was resolved above the stated method threshold.
Boundary: It does not mean the analyte is proven absent or exactly zero.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Cycled or commissioned
A system has demonstrated processing of a defined nitrogen challenge under stated conditions.
Boundary: Tank age, nitrate, bottled bacteria or clear water alone do not establish capacity.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Biofilm
A surface-associated community and matrix.
Boundary: A visible coating is not one organism, a guaranteed food quantity or proof of a complete diet.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Acclimation
A planned transition between source and receiving conditions.
Boundary: The method should respond to the actual differences and package state; there is no universal drip duration.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Quarantine
Separation of a source contact network with observation, dedicated equipment and a release decision.
Boundary: It reduces selected risks but cannot prove that animals are pathogen-free.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Stocking density
Animal number relative to a defined volume, area or other unit at a stated time.
Boundary: System capacity also depends on life stage, feeding, surface, filtration, oxygen and maintenance.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
House recipe
A documented operating choice used by one keeper or facility.
Boundary: Reproducibility makes it auditable; it does not make the recipe a species optimum.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
No release
Never place shrimp, eggs, plants, water, substrate or filter material where aquarium life can reach natural waters.
Boundary: A captive origin or local sighting does not make release safe.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Experimental unit
The smallest independently assigned unit in a comparison, often a tank or vessel rather than every animal inside it.
Boundary: Subsamples do not create treatment replication.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Biological replicate
An independently sampled biological unit under the design.
Boundary: Repeated readings or PCR wells from the same biological material are technical replicates.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Endpoint
The outcome actually measured, such as survival, growth, attached eggs or gene expression.
Boundary: A molecular endpoint is not automatically health, welfare or reproductive success.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Controlled experiment
A design assigning a treatment or controlled comparison.
Boundary: Its species, unit, dose, duration and endpoint still limit the claim.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Field observation
A record from a natural or introduced population.
Boundary: Occurrence and association do not establish causation or a home-aquarium optimum.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
LC50
A concentration estimated to kill half of the tested group during a defined exposure.
Boundary: It is not a safe concentration, chronic limit or treatment dose.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
NOEC
The highest tested concentration with no statistically detected effect under that design and analysis.
Boundary: It is bounded by the tested concentrations, power and endpoints and does not mean zero risk.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Optimum
A condition that performs best for a defined objective across an adequate comparison.
Boundary: One successful condition, field reading or house recipe does not establish an optimum.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Supports
The nearest claim justified by the source methods and results.
Boundary: Support stays limited to the studied taxon, design, conditions, unit, duration and endpoint.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
Limits
The nearest tempting claim the source cannot justify.
Boundary: A useful citation keeps both supports and limits attached.
Reviewed 2026-08-12. Result order is textual relevance, not quality, certainty, severity or importance.
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