Fish biology

The study of fish, shellfish or crustacean organisms, categorized into many specialised fields that cover their morphology, physiology, anatomy, behaviour, origins and distribution.

scope of ichthyology
biology of fish
field of ichthyology
science of fish biology
field of fish biology
science of ichthyology
scope of fish biology
ichthyology

knowledge

sector-specific

Fish biology is an essential knowledge of the following occupations:

Aquaculture hatchery manager: Aquaculture hatchery managers plan, direct, and coordinate the production in large-scale aquaculture operations to breed fish and shellfish, developing aquaculture breeding strategies using various types of spawning techniques. They control the reproduction and the early life cycle stages of cultured species. They supervise incubation, early feeding and rearing techniques of the cultured species.
Aquaculture cage technician: Aquaculture cage technicians operate in the production of aquatic organisms in water-based (freshwater, brackish water, salt water) on-growing processes in cages.
Fisheries adviser: Fisheries advisers provide consultancy on fish stocks and their habitats. They manage the costal fishing business modernisation and provide improvement solutions. Fisheries advisers develop plans and policies for fisheries management. They may provide advice on protected farms and wild fish stock.
Aquaculture harvesting manager: Aquaculture harvesting managers control harvesting operations of aquatic organisms which entails understanding and knowledge of techniques and equipment used in harvesting processes.
Aquaculture production manager: Aquaculture production managers plan, direct and coordinate the production of fish, shellfish or other forms of aquatic life such as cash crops, in large-scale aquaculture operations to culture and harvest or for release into fresh, brackish or salt water. 

Aquaculture biologist: Aquaculture biologists apply knowledge gained from research about aquatic animals and plant life and their interactions with each other and the environment, in order to improve aquaculture production, prevent animal health and environmental problems and to provide solutions if necessary.

Aquaculture rearing technician: Aquaculture rearing technicians operate in aquatic organisms’ production. They are specialists in the rearing, weaning and production of juveniles.
Aquatic animal health professional: Aquatic animal health professionals diagnose, prevent and treat diseases, injuries and dysfunctions of aquatic animals by implementing appropriate sampling protocols. They supervise the use of medicines, including vaccines, and collect data on fish health, making regular reports to the appropriate personnel. They may provide care to a wide range of aquatic animals or specialise  in the treatment of a particular group or in a particular speciality area. They may provide advice, support and training to farm staff on best practice with regard to the health and welfare of the cultured organisms.
Aquaculture recirculation manager: Aquaculture recirculation managers control the production of aquatic organisms in land-based recirculation systems, manage water re-use processes and supervise complex circulation, aeration and biofilter systems.
Aquaculture husbandry manager: Aquaculture husbandry managers specialise in the husbandry of ongrowing aquatic species, especially in the feeding, growth, and stock management processes.
Aquaculture environmental analyst: Aquaculture environmental analysts assess, plan and implement programmes to recognise, monitor and control environmental factors that can potentially affect the health of aquatic animals and plants.
Aquaculture harvesting technician: Aquaculture harvesting technicians operate the harvesting process of aquatic organisms’ production, managing the complex equipment and machinery used in the harvesting of specific cultured species.
Aquaculture husbandry technician: Aquaculture husbandry technicians operate in aquatic organisms’ production, specialising in the husbandry of ongrowing culture processes, especially in feeding and stock management.
Aquaculture hatchery technician: Aquaculture hatchery technicians operate and control all aspects of the hatchery production processes, from broodstock management to pregrowing juveniles.
Aquaculture recirculation technician: Aquaculture recirculation technicians operate and control the production processes of aquatic organisms in land-based recirculation systems, which utilise water re-use processes and the operation of pumping, aerating, heating, lighting and biofilter equipment as well as backup power systems.

Fish biology is optional for these occupations. This means knowing this knowledge may be an asset for career advancement if you are in one of these occupations.

Environmental education officer: Environmental education officers are responsible for promoting environmental conservation and development. They visit schools and businesses to give talks, they produce educational resources and websites, they lead guided nature walks, they provide relevant training courses, and they help with volunteer activities and conservation projects. Many gardens employ an environmental education officer to offer guidance during school visits.
Aquaculture cage mooring worker: Aquaculture cage mooring workers operate highly-specialised equipment in order to moor cages in stable stations, drifting cages or even self-propelled and semi-submerged cages. 
Nature conservation officer: Nature conservation officers manage and improve the local environment within all the sectors of a local community. They promote awareness of and understanding about the natural environment. This work can be very varied and involve projects related to species, habitats and communities. They educate people and raise overall awareness of environmental issues.
Ecologist: Ecologists carry out assessments of the health and distribution of organisms, namely people, plants, and animals, and the relationship between organisms and their environment. Ecologists usually have a specialisation area, e.g. freshwater, marine, terrestrial, fauna, and flora about which they conduct research and perform relating tasks. 
Water-based aquaculture worker: Water-based aquaculture workers carry out manual activities in the ongrowing processes of cultured aquatic organisms in water-based suspended systems (floating or submerged structures). They participate in extraction operations and the handling of organisms for commercialisation. Water-based aquaculture workers maintain and clean facilities (nets, mooring ropes, cages)..
Aquaculture mooring manager: Aquaculture mooring managers carry out and supervise the mooring of cages in stable stations, drifting cages or even self-propelled and semi-submerged cages. They safely operate and moor a variety of different types of large-scale cages, manage conditions such as currents, wave climate and seabed profile, in open or semi-open water areas.
Biologist: Biologists study living organisms and life in its broader extent in combination with its environment. Through research, they strive to explain the functional mechanisms, interactions, and evolution of organisms.

References

1. Fish biology – ESCO