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Aquatic Terminology
Below are 4 terminology groups which will help you to understand certain aspects of keeping, breeding and caring for your angelfish.
ANATOMY

Every hobbyist should try to acquaint themselves with the external anatomy of the fish they keep. The names of various fins and parts of the body are constantly occurring in the description of the species. Here you will find help with the identification and definition of the various fish parts.

AQUATIC

A very extensive aquatic terminology data base from A-Z. This data base will help you to understand terms used in aquaria and how they relate with other factors of the aquarium hobby. Finarama would like to thank Patrick of "Badman's Tropical Fish" for his contribution in supplying us with much of the terminology listed in this section.

GENETICS

Genetics means the study of inherited variation also known as polymorphism.

(1) The study of genes through their variation.
(2) The study of inheritance.

Polymorphism is the occurrence, together in the same population, of more than one allele or genetic marker at the same locus with the least frequent allele or marker occurring more frequently than can be accounted for by mutation alone. Genes are the fundamental physical and functional unit of heredity, which carries information from one generation to the next. 

It is important to remember that an Angelfish's color, growth rate and adult size are a product of not only it's genetic material but also environmental factors. These factors include, but are not limited to, tank size, temperature, frequency of feeding, nutrition, water quality, and the length of day called the "photo period." Dr. Joanne Norton has spent over 20 years studying the genetics of Angelfish. Her articles will help you to understand how the genetics and environmental influences work together to produce many of our angelfish varieties. The genetics terminology will allow you to have a better understanding of the terms used and how they work.

TAXONOMY

One of the most interesting fields of interest in the study of Biology is taxonomy. Although there are other fields out there such as ecology and embryology, taxonomy is easy to comprehend, restricted to a small set of structural information, and is good to know as reference. Taxonomy, also called systematics, is the study of the classification of all living organisms.

 
Pterophyllum Altum - Pellegrin 1903
 
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