Test your sea smarts!
Picture this: You're having a nice day at the beach, watching the waves roll in. A small, translucent creature washes up near your feet. Everyone around you shrugs and keeps walking, but you stop and crouch down, examining its gelatinous body. You're not sure, but you think it might be a type of jellyfish—maybe a moon jelly? You wish you knew for sure.
If that sounds like you, congratulations—you might actually be a marine biologist at heart! But don't worry if you've never stepped foot in a lab or donned scuba gear. Marine biology isn't just for professionals; it's for anyone fascinated by the ocean and its countless mysteries. If you've ever been amazed by bioluminescent creatures, curious about what whales are saying to each other, or wondered why octopuses are so smart, you're in the right place.
This marine biology trivia quiz is here to test your marine knowledge and maybe even teach you a few things along the way. If you can answer 15 out of 20 correctly, you just might have what it takes to be a marine biologist. No pressure!
5 Fascinating Facts About Marine Life
There's something undeniably intriguing about the ocean and its inhabitants. Maybe it's the sheer mystery—after all, more than 80% of the ocean remains unexplored. Or perhaps it's the sheer diversity of life, from microscopic plankton to the massive blue whale.
The ocean is an entire world filled with creatures that seem almost alien compared to land animals. Consider these mind-blowing facts:
- Octopuses have three hearts and can change color instantly.
- Some jellyfish are technically immortal, capable of reversing their aging process.
- There's a species of shark that can live for over 400 years.
- Dolphins have names for each other—specific whistles that act as unique identifiers.
- The ocean produces over half of the world's oxygen.
If any of those underwater trivia made you do a double take, just wait until you see the questions in this quiz.
How to Take This Marine Biology Trivia Quiz
Taking this quiz is easy! Just follow these steps:
- Read each question carefully.
- Select the answer you think is correct.
- After each question, you'll see an explanation, so you can learn more about marine life as you go.
- Answer all 20 questions to get your final score.
- Compare your score with the results and see if you have what it takes to be a marine biologist.
If you score 15 or higher, you're a marine biology pro! But even if you don't, you'll still walk away with some fun ocean facts to impress your friends.
Time to Test Your Marine Knowledge!
So, do you think you have what it takes? Are you a true ocean expert, or just someone who enjoys watching documentaries about whales? There's only one way to find out! Take the quiz now and see how much you really know about marine life.
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27 Comments
I got 16 out of 20!
You might be part fish! Scoring 15 or more means you have an impressive knowledge of marine biology. From tiny phytoplankton to the massive blue whale, you know your oceanic facts. Maybe it’s time to consider a career in marine science!
BONUS QUESTION: What is the rarest marine animal? Answer in the comments!
Not bad! answer is vaquita
I got 20 out of 20!
You might be part fish! Scoring 15 or more means you have an impressive knowledge of marine biology. From tiny phytoplankton to the massive blue whale, you know your oceanic facts. Maybe it’s time to consider a career in marine science!
BONUS QUESTION: What is the rarest marine animal? Answer in the comments!
You got 12 out of 20!
Coulda been worse
coelocanth
I got 20 out of 20!
You might be part fish! Scoring 15 or more means you have an impressive knowledge of marine biology. From tiny phytoplankton to the massive blue whale, you know your oceanic facts. Maybe it’s time to consider a career in marine science!
BONUS QUESTION: What is the rarest marine animal? Answer in the comments!
15/20 Thank you for showing the correct answere.
13/20
Vaquita rarest marine animal.
yup
I got 20 out of 20!
You might be part fish! Scoring 15 or more means you have an impressive knowledge of marine biology. From tiny phytoplankton to the massive blue whale, you know your oceanic facts. Maybe it’s time to consider a career in marine science!
BONUS QUESTION: What is the rarest marine animal? Answer in the comments!
Vaquita
16/20 Good, I’m part fish apparently.
NO WAY, me too
I got 13 out of 20 – 65%
Not bad at all! You clearly have a solid grasp of marine life, even if you’re not quite Jacques Cousteau yet. You might not be an expert, but you appreciate the ocean and its many mysteries. Keep learning—you never know when your marine knowledge might come in handy!
BONUS QUESTION: What is the largest animal to ever live on Earth? Answer in the comments!
20 / 5 / 25
13 out of 20. On a college test that usually converts to a big “D”. At least I know cetaceans are mammals, not fish.
I got 18 out of 20!
You might be part fish! Scoring 15 or more means you have an impressive knowledge of marine biology. From tiny phytoplankton to the massive blue whale, you know your oceanic facts. Maybe it’s time to consider a career in marine science!
BONUS QUESTION: What is the rarest marine animal? Answer in the comments!
2/20 👍🏻
“who lives in a pineapple under the sea?
SpongeBob SquarePants!”
lol
I got 16 out of 20!
You might be part fish! Scoring 15 or more means you have an impressive knowledge of marine biology. From tiny phytoplankton to the massive blue whale, you know your oceanic facts. Maybe it’s time to consider a career in marine science!
BONUS QUESTION: What is the coolest marine animal? Answer in the comments!
A) Orcas are the coolest and most interesting/complex marine animals, imo
B) “You are not a fish. You are not a fish!”- Kenny from the movie “Half-baked.”. lol
(Edited)
I got 20 out of 20!
You might be part fish! Scoring 15 or more means you have an impressive knowledge of marine biology. From tiny phytoplankton to the massive blue whale, you know your oceanic facts. Maybe it’s time to consider a career in marine science!
BONUS QUESTION: What is the rarest marine animal? Answer in the comments!
I knew the swim bladder question because my fish died because of an issue with that :'(
(For the bonus question it’s the vaquita :3)
17/20. Rarest sea mammal is the vaquita. I admit to googling that one. It is closely followed by the Hawaiian monk seal. The question was sea animal though, not specifically mammal. There is a list of less than a dozen that include some fish and other marine creatures. So we’ll stay with the vaquita. Funny thing is I’m pretty sure I saw something about this on a documentary quite recently. Poor old brain, getting a bit overloaded. I probably have to thank my older granddaughter for this score. We seem to be sea people but she had a particular fascination with sea creatures, especially sharks and rays. She was practically an expert by the time she was about 12. I went to a big aquarium with her when she was about 16 and I thought we would never leave. She is in her late 20s now and mother to my great grandson and I reckon he’ll know lots about the sea by the time he starts school.
👍
That’s interesting.
Thanks for sharing that.
🤘🤘
(Edited)
I got 12 out of 20!
Not bad at all! You clearly have a solid grasp of marine life, even if you’re not quite Jacques Cousteau yet. You might not be an expert, but you appreciate the ocean and its many mysteries. Keep learning—you never know when your marine knowledge might come in handy!
BONUS QUESTION: What is the largest animal to ever live on Earth? Answer in the comments!
Brontosaurus
I got 17 out of 20!
You might be part fish! Scoring 15 or more means you have an impressive knowledge of marine biology. From tiny phytoplankton to the massive blue whale, you know your oceanic facts. Maybe it’s time to consider a career in marine science!
BONUS QUESTION: What is the rarest marine animal? Answer in the comments!
Thanks Wild Kratts and Octonauts!! Lol. Hmm… rarest marine animal… the colossal squid?
20/20
The Rarest Marine Animal Is The Vaquita