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Nautical Trivia

February 27, 2018

1. Did you know that Sharks have teeth all over their bodies?   As if the teeth in their mouth aren’t enough, sharks do not have scales on their bodies like other fish, they have denticles instead.  They are covered with small razor-sharp, tooth like constructions.  Denticles overlap like scales, but if you rubbed against them, they would rip right through your skin.

2. Did you know that starfish, whose real name is sea star is not a fish at all?   It’s a creature that lives in the ocean and takes several shapes.  The most common is the five-pointed star – five arms with a body in the center.

3. Did you know that the sea star “sees” with a small colored eyespot at the tip of each arm?   These eyespots sense light but can’t form images.   The feet are rows of slender tubes that extend from the body to the end of each arm.  A suction disk at each tip gives the sea star the ability to crawl along the ocean floor.

 4. Did you know that clams eat?  It opens its shell slightly to let dinner in.  Tiny hairs filter food into a small mouth, then absorbed into the intestines.  Clams eat tiny water plants and sea animals called plankton.

5. Did you know that although clams seem to be blob like creatures, they have a digestive system, and even a heart and blood vessels?
6. Did you know that a Living Fossil is a plant or animal that has survived almost unchanged for millions of years?

7. Did you know that a fish called the coelacanth (See-luh-kanth) is a famous example?   Until 1938, scientists believed that coelacanths had been extinct for 90 million years; then a living one was caught off the coast of South Africa.

8. Did you know that Sharks are also living fossils?   They appeared more than 360 million years ago, long before dinosaurs.

9. Did you know that flying fish are gliders, not true fliers?   Flying fish leap out of the water to escape predators, gliding for short distances on their long front fins.

10.  Do you know why ice floats?   Substances are usually most dense when they are solid because that is when their molecules are most compact.   Water is different.  Water molecules are farther apart when water is solid (ice) than when it is liquid.  This means that ice is less dense than water – so it floats.

11. Did you know without ice floating, lakes and other bodies of water would freeze solid from the bottom up.  The aquatic animals would not survive winter.


 

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