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In addition to formal education, many aquariums, like other types of museums, look for a strong interest in the field before hiring an applicant. Most often, they look for a history of volunteering. That means you need to look for every avenue you can find to work around fish or other animals. Do as much as your schedule allows. Even working part-time or volunteering at a local pet store counts. Also, be sure to ask your career guidance counselor for information on marine science careers and opportunities for summer internships or college scholarships offered by larger institutes.
You should also consider joining the Association of Zoos and Aquariums (AZA), which offers a an associate membership category open to individuals who are “employees of a non-AZA member zoo or aquarium, or actively seeking employment in the zoo/aquarium community,” and a membership category for college students.
Aquarists (pronounced, like "aquarium," with the accent on the second syllable) work for aquariums, oceanariums, and marine research institutes. Aquarists are not animal trainers and do not work on marine shows. They do, however, support the staff who do. Their work is generally technical and requires a strong science background. With increased experience and education, aquarists may, in time, become involved in research efforts at their institution or become promoted to higher professional positions such as curator.
Aquarists' job duties are similar to those of zookeepers. Aquarists feed fish and other marine animals, maintain exhibits, and conduct research. They work on breeding, conservation, and educational programs.
Aquarists clean and take care of tanks every day. They make sure pumps are working, check water temperatures, clean glass, and sift sand. Some exhibits have to be scrubbed by hand. Aquarists also change the water and vacuum tanks routinely. They water plants in marsh or pond exhibits.
Food preparation and feeding are important tasks for aquarists. Some animals eat live food and others eat cut-up food mixtures. Some animals need special diets prepared and may have to be individually fed.
Aquarists carefully observe all the animals in their care. They must understand their normal habits (including mating, feeding, sleeping, and moving) in order to be able to judge when something is wrong. Aquarists write daily reports and keep detailed records of animal behavior.
Many aquarists are in charge of collecting and stocking plants and animals for exhibits. They may have to make several trips a year to gather live specimens.