You are deeply mistaken if you think aquarium inhabitants are boring and nothing interesting can be said about fish. The most amazing and interesting facts about fish:
- 1. The smallest aquarium measures 3 cm in length and 1.5 cm in width. This tiny home has plants, sand, and even a lovely home for a few tiny fish.
- 2. Any normal aquarist immediately panics When a fish is floating upside down. However, for aquarium catfish, such behavior is entirely normal.
- 3. A particular catfish can make squeak-like sounds using their pectoral fins.
- 4. The knifefish lacks pectoral and dorsal fins, which does not prevent it from swimming back and forth. The anal fin helps her with this.
![fish knife](https://7petdays.com/wp-content/uploads/sites/3/2023/10/ryba-nozh.jpg)
- 5. Interesting fish are polyptera, which have the talent to walk along the bottom.
- 6. The aquarium, which surprises few people, was developed by the English scientist H. Ward in 1841.
- 7. In the lobby of the Berlin Radisson Hotel, the world’s largest aquarium is shaped like a cylinder and 25 meters high. It is home to as many as 56 species of fish. The facts about fish don’t end there!
- 8. The largest aquarium fish is Astronotus ocellatus. It is oval and 35 cm long.
![Astronotus ocellatus](https://7petdays.com/wp-content/uploads/sites/3/2023/10/Astronotus-ocellatus.jpg)
- 9. The female eel lived the longest life. She died at the age of 88.
- 10. The creeper fish (Pineapple) can move on land and climb a tree.
- 11. Tetradons are amusing fish that, when frightened, swell up and become like a ball.
- 12. In case of danger, surgeon fish release sharp spines hidden in the tail section.
![Surgeon fish](https://7petdays.com/wp-content/uploads/sites/3/2023/10/rybki-hirurgi.jpg)
- 13. Acanticuses are utterly indifferent to other types of fish but cannot stand their kind and destroy them.
- 14. The aquarium fish gastromizon must live in fast current conditions. Suction cups all over its body hold it in place during strong currents.
- 15. All clownfish are born males, but if necessary, change their sex.
- 16. Ocellarises live among sea anemones, stinging coral polyps that can kill any aquatic inhabitants with their poison. A sea anemone is a bodyguard for this type of fish.
![Top 20 Facts About Fish](https://7petdays.com/wp-content/uploads/sites/3/2023/10/otsellyarisy.jpg)
- 17. Goldfish will be leaders regarding the amount of exciting information. At one time, Europeans thought that its only food was water.
- 18. Goldfish are cold-blooded, and their metabolism depends entirely on the temperature of the water.
- 19. Contrary to popular belief, a goldfish memory lasts three months.
- 20. Goldfish can also be metallic or pink.
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