Marine Life questions
44 fact-checked questions — tap any to predict the answer, then read why.
- When a cold Arctic stream turns orange and acidic with dissolved metals after permafrost thaw, which fish hazard does that chemistry point to first?
- Platypuses and electroreceptive dolphins are passive electroreceptors. What are they reading?
- Platypus bills and some dolphin whisker pits both sense weak electric fields. What pattern is this?
- A nesting sea turtle looks like it is crying. What is the useful job?
- Which organism makes the most of Earth's oxygen?
- Why do sea anemones wave tentacles?
- Why do swordfish have long bills?
- Why do barnacles attach permanently?
- Why do lobsters molt their shells?
- Why do sea cucumbers eject organs?
- Why do remora fish stick to sharks?
- Why can hagfish produce slime?
- Why do cuttlefish flash colors?
- Why do moray eels have second jaws?
- Why do sea otters use rocks?
- Why do pufferfish inflate?
- Why do archerfish spit water?
- Why do flying fish leap out of water?
- Why do deep-sea fish survive pressure?
- Why does ocean water glow at night?
- Why do electric eels shock?
- Why do nautiluses float and sink?
- Why are male seahorses pregnant?
- Why do corals bleach white?
- Why do dolphins use echolocation?
- Why do anglerfish have lights?
- Why do parrotfish make sand?
- Why do mantis shrimp punch so hard?
- Why do some jellyfish glow?
- Why can sharks sense electricity?
- Why do whales sing underwater?
- Why do octopuses change color?
- Why is coral an animal, not a plant?
- Why can starfish regrow their arms?
- Why do seahorses swim upright?
- Why do deep-sea fish glow?
- Why do clownfish live in anemones?
- Why do sea turtles return to birth beach?
- Why do some sharks swim constantly?
- Why do octopuses have three hearts?
- Why do crabs walk sideways?
- Why do jellyfish sting?
- Why can whales hold breath so long?
- Why do fish have scales?