Fishkeeping glossary
The vocabulary of the average fish expert probably includes hundreds of words you've never heard of before. To help you understand it all we've made this nifty glossary so you can swot up on the terminology.- Abaxial
- Abbreviata
- Abbreviate heterocercal
- Abdomen
- Aberrant
- Abiotic
- Abraded
- Absolute fecundity
- Absorption spectrum
- Abyssal benthic
- Abyssal zone
- Acanthocephalan
- Accessory caudal ray
- Acclimation
- Acentric
- Acid
- Acidic
- Acidophile
- Acontia
- Acoustic harassment device
- Acoustico-lateralis system
- Acquired immunity
- Acron
- Acropora
- Acrosome
- Actinic bulbs
- Activated carbon
- Active transport
- Adaptive radiation
- Adductor muscle
- Adipose eyelid
- Adipose fin
- Aeration
- Aerial respiration
- Aerobic
- Aestivation
- Agnathan
- Aiptasia
- Airstone
- Albino
- Algae
- Alkaline
- Alkalophile
- Allele
- Allopatric speciation
- Allotype
- American hardness
- Ammonia
- Anadromous
- Anaerobic
- Anal fin
- Annelid
- Antennae
- Anterior
- Antibody
- Aphyosemion
- Apistogramma
- Apomorphy
- Aposematic color
- Aquarist
- Aquaristics
- Arrhenotoky
- Artemia
- Autecology
- Autotomy
- Axillary process




