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SCUBA QUIZ: What Is The Oldest Fish?

The age of fish, especially of those we eat, is important for keeping a population healthy. Do you have any idea how you can guess their age? Try this quiz and discover how old various fish species get.

The age of marine life species, especially of those we eat, is important for keeping a population healthy. There needs to be a balance with young and adult fishes to keep the stock reproductive. Watch the video about Fish Sanctuaries (scroll down) to learn more about this.

To determine the age of marine life species the easiest (but not very accurate) way is to look at the size. Just like humans fish grow older with age, the bigger the older in general. A more accurate way is to look at the inner ear bone of fish (called a otolith), it contains year-rings similar to a tree. Of course this can only be researched when the fish is no longer alive, but it is quite impressive - don't you think?

Can you guess the average maximum age of these species in the wild?

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  2. lionfishbonaire.jpg
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    Queen Angelfish
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    Whale shark (yes, it is a fish!)


Reef FISH Identification
Paul Human

My favourite books for fish identification, good photos and very detailed!

  • Parrotfish live up to 7 years in the wild. Parrotfish often have bright colors and their teeth/beaks are used for scraping algae from rocks (noisy!)

  • Lionfish live up to 15 years in the wild. Lionfish are an invasive species in the Caribbean, spreading quickly and harmfully while eating everything that fits their mouth.

  • Clownfish live up to 10 years in the wild. There are 28 different species of clownfish.

  • Queen Angelfish live up to 15 years in the wild. The queen is recognized by the little crown above the eyes.

  • Whale sharks live up to 70 years in the wild. Whale sharks are the largest fish on earth growing up to 12 meters / 39 feet.
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How many did you got right?

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