The goldfish (Carassius auratus) is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is commonly kept as a pet in indoor aquariums, and is one of the most popular aquarium fish. Goldfish released into the wild have become an invasive pest in parts of North America. Goldfish breeds vary greatly in size, body shape, fin configuration, and coloration (various combinations of white, yellow, orange, red, brown, and black are known).

1. UNIVERSITY OF CHAKWAL, PAKISTAN

2. TOPIC: CARASSIUS
AURATUS(GOLDFISH)
DEPARTMENT OF ZOOLOGY
PRESENTED BY: NAYAB NADEEM
ROLL NO# UOC-BSZOL-F2020/037
BS ZOOLOGY
SESSION: 2020-2024
SUBJECT: ICHTHYOLOGY
INSTRUCTOR NAME: DR. SYEDA NADIA
AHMED

3. ❖Table of contents:
➢ Introduction.
➢ Taxonomic classification.
➢ Distribution.
➢ Importance.
➢ Interesting facts.
➢ Morphology.
➢ Parental care.
➢ Recent researches.
➢ References.

4. INTRODUCTION
• General Characters:
▪ Status: Freshwater fish.
▪ Body shape: High-bodied, laterally compressed fish.
▪ Mouth shape: Small and terminal.
▪ Tail: Flat, truncate tails.
▪ Fins: Dorsal, Caudual, Anal, Pelvic, and the Pectoral.
▪ Scales: Metallic, matted, or nacreous scales (Komiyama, T
et.,al 2007)

5. • Meristic characters:
▪ Feeder: omnivores ( can also have basic fish flakes or
pellet food)
▪ Migration: No migration.
▪ Life span: 10-15 years, with some varieties living up to 30
years.
▪ Weight: 100g- 300g with a maximum of 3.0 kg.
▪ Natural predators: Great blue heron (Komiyama, T et.,al
2007)

6. TAXONOMIC CLASSIFICATION
▪ Kingdom: Animalia
▪ Phylum: Chordata
▪ Class: Actinopterygii
▪ Order: Cypriniformes
▪ Family: Cyprinidae
▪ Genus: Carassius
▪ Species: C. Auratus

7. China
United
states
Canada
Distribution:

8. IMPORTANCE OF GOLDFISH:
▪ Underwood first described the role of goldfish in devouring
mosquito.
▪ Useful model organism.
▪ Goldfish is equally suitable for both in vivo and in vitro
studies.
▪ goldfish is one of the fishes most employed for behavioral
studies.
▪ Widespread popularity as pets ( Blanco, A et.,al 2018)

9. INTERESTING FACTS:
▪ Are known as a hearing specialist
species.
▪ Showed a generalized response to
spectrally and temporally complex
sounds (Shinozuka, K., Ono, H., &
Watanabe, S. 2013)
Fig.1.1.Hearing in goldfish
https://images.app.goo.gl/iSj
FJrYKvxarK48A8

10. 3D VISUAL PERCEPTION:
▪ Studies show evidence of viewpoint
dependance and in dependence.
▪ Success in recognizing rotated stimuli
depending on shape complexity and
orientation (Wegman, J. J et.,al 2022)
Fig.1.2. Structure of eye of goldfish.
https://images.app.goo.gl/SLN3JUt1
RdV7YPvA9

11. MORPHOLOGY:
• Streamlined body with a single dorsal fin.
• A forked caudal fin (tail)
• Paired pectoral (side), pelvic (ventral),
and anal fins.
• Four gill covers on either side of the head
for respiration.
• A pair of barbels near their mouths, which
are thought to function as taste
receptors(Parichy, D et.,al 2014)
Fig.1.3. Morphology of goldfish
https://images.app.goo.gl/EYuJ
GbJqMZJzoErS7

12. PARENTAL CARE:
• Goldfish do not invest much time or energy into individual offspring.
• . Many eggs are fertilized and laid among the ground.
• The number of offspring likely to survive without any parental care.
• If goldfish provided parental care, they would not be able to continue
reproducing (Sánchez-Vázquez, F. J et.,al 2019)

13. RECENT RESEARCH:
▪ Oranda goldfish being in ornamental
fish trade
▪ Its production affected by infections.
▪ Desert rose flower to be
used(Prakoso, Y. A et.,al 2023)
Fig.1.4.Oranda Goldfish
https://images.app.goo.gl/fQ66M
8ZCRtbgJTAr5

14. REFERENCES
Komiyama, T., Kobayashi, H., Tateno, Y., Inoko, H., Gojobori, T., & Ikeo, K. (2009).
An evolutionary origin and selection process of goldfish. Gene, 430(1-2), 5-11.
Parichy, d. M., Wedermeyer, W. J., Liang, D., Lin, S., & Yan, Y. (2014). Goldfish
morphology as a model for evolutionary developmental biology. Development genes
and evolution, 224(2), 100-110.
Sánchez-vázquez, f. J., López-olmeda, J. F., Vera, L. M., Migaud, H., López-patiño,
M. A., & Míguez, J. M. (2019). Environmental cycles, melatonin, and circadian
control of stress response in fish. Frontiers in endocrinology, 10, 279.

15. REFERENCES:
Wegman, J. J., Morrison, E., Wilcox, K. T., & Delong, C. M. (2022). Visual perception of
photographs of rotated 3D objects in goldfish (carassius auratus). Animals, 12(14), 1797.
Prakoso, y. A., Babazadeh, D., & Wijayanti, A. D. (2023). Potency of desert rose (adenium
obesum (forssk.) Roem. & Schult.) Flower extract against artificially induced furunculosis
in oranda goldfish (carassius auratus auratus). Pakistan veterinary journal, 43(2).
Blanco, a. M., & Unniappan, S. (2022). Goldfish (carassius auratus): biology, husbandry,
and research applications. Laboratory fish in biomedical research, 373-408.
Shinozuka, K., Ono, H., & Watanabe, S. (2013). Reinforcing and discriminative stimulus
properties of music in goldfish. Behavioural processes, 99, 26-33.