What is the approximate average salinity of open-ocean seawater?
Answer
35 parts per thousand
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What is the approximate average salinity of open-ocean seawater?
Answer
35 parts per thousand
What chemical molecule produces light in many bioluminescent marine organisms?
Answer
Luciferin
What defensive behavior lets some sea cucumbers expel internal organs?
Answer
Evisceration
Which giant tube worm lives around deep-sea hydrothermal vents without a digestive tract?
Answer
Riftia pachyptila
In bony fish, what sensory system detects water movement along the body?
Answer
Lateral line system
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Latest trivia questions
What defensive behavior lets some sea cucumbers expel internal organs?
Answer
Evisceration
Which giant tube worm lives around deep-sea hydrothermal vents without a digestive tract?
Answer
Riftia pachyptila
In bony fish, what sensory system detects water movement along the body?
Answer
Lateral line system
In baleen whales, what comb-like structures filter food from seawater?
Answer
Baleen plates
Which ocean zone receives enough sunlight for most marine photosynthesis?
Answer
Photic zone
What is the world’s largest fish by body mass?
Answer
Whale shark
What is the largest species of penguin, measured by height and mass?
Answer
Emperor penguin
What pigment gives many red algae their characteristic red or purplish color?
Answer
Phycoerythrin
Which treatment earned Emil von Behring the first Nobel Prize in Physiology or Medicine?
Answer
Diphtheria antitoxin