10 most difficult sea animals riddles A list of sea animals related questions that are most often answered incorrectly Nature quiz Which turtles are the biggest?Leatherback. The leatherback sea turtle, the only extant member of the family Dermochelyidae, is the largest of all living turtles and is the fourth largest modern reptile behind three crocodilians. In the Caribbean, the mean size of adults was reported at 384 kg (850 lb) in weight. The largest ever found weighed 916 kilograms (2,020 lb).very hard 30% greengreen3%leatherbackleatherback30%aldabra giant tortoisealdabra giant tortoise18%galapagos tortoisegalapagos tortoise48%Created by: globalquiz.org. Statistics based on 8263 answers in 4 languages »reptiles riddles » Which sea turtles are the deepest divers?Leatherback turtles are one of the deepest diving marine animals. Individuals have been recorded diving to depths as great as 1,280 meters (4,200 ft). Such depths are unreachable for turtles with hard shells, as these would have been crushed by the pressure.very hard 37% hawksbillhawksbill17%leatherbackleatherback37%loggerheadloggerhead20%greengreen24%Created by: Jason Beagley. Statistics based on 12041 answers in 2 languages »zoology riddles » What kind of animal is a seahorse?A fish. Although seahorses are bony fish, they do not have scales, but rather thin skin stretched over a series of bony plates, which are arranged in rings throughout their bodies.hard 52% a fisha fish52%a crustaceana crustacean15%a mollusca mollusc25%a sluga slug7%Created by: globalquiz.org. Statistics based on 8936 answers in 2 languages »nature riddles » What is the inventive hunting technique of humpback whales?Bubble net. A group of whales swims in a shrinking circle blowing bubbles below a school of prey. Forage fish show a strong fear of bubbles and can be easily contained within a bubble curtain. The shrinking ring of bubbles encircles the school and confines it in an ever-smaller cylinder. The whales then suddenly swim upward through the "net", mouths agape, swallowing thousands of fish in one gulp.hard 54% bubble netbubble net54%stunning song stunning song 20%sudden chargesudden charge13%light lurelight lure11%Created by: globalquiz.org. Statistics based on 12846 answers in 2 languages »carnivores riddles » What does swordfish use their sword for?Hunting. Swordfish charge at high speeds through forage fish schools, slashing with their swords to kill or stun prey (contrary to the popular belief, they do not "spear"). They then turn and return to consume their catch.hard 55% huntinghunting55%attracting femaleattracting female14%buoyancybuoyancy14%electrical detectionelectrical detection15%Created by: globalquiz.org. Statistics based on 19330 answers in 4 languages »fish riddles » What is narwhal 'horn' really made of?It is a canine tooth. Usually, males have a single long tusk, the canine on the left side of the upper jaw that projects through the lip and forms a left-handed helix. The tusk grows throughout life reaching length of 3 m (10 ft). In some rare cases, both canines grow equally long, forming two tusks. In the Middle Ages, narwhal tusks were sold as unicorn horns.hard 56% it is a horn grown on its foreheadit is a horn grown on its forehead9%it is an adapted scaleit is an adapted scale5%it is a canine toothit is a canine tooth56%it is an adapted nose boneit is an adapted nose bone28%Created by: Betty. Statistics based on 15307 answers in 4 languages »teeth riddles » What kind of lobster is red when fully grown up?None. The normal coloration of lobster is dark bluish green to greenish brown, redder on the body and claws, and greener on the legs. An estimated one in 2 million lobsters are blue. All of them turn red after cooking.hard 57% American lobsterAmerican lobster19%European lobsterEuropean lobster14%Norway lobster (scampi)Norway lobster (scampi)9%nonenone57%Created by: Hitter smasher. Statistics based on 28950 answers in 2 languages »food riddles » Why is this seahorse male so thick?It is pregnant. Seahorse males deliver the babies. After mating, the fertilized eggs are embedded in the pouch wall and become surrounded by a spongy tissue. The male provides oxygen and supplies the eggs with prolactin, the same hormone responsible for milk production in pregnant mammals.easy 73% it is pregnantit is pregnant73%it has swallowed an octopusit has swallowed an octopus2%it is changing skinit is changing skin5%it holds some air insideit holds some air inside18%Created by: globalquiz.org. Statistics based on 14949 answers in 4 languages »animals riddles » Box jellyfish have sophisticated eyes with a lens and a retina. How big is its brain?Jellyfish have no brain. Their speed and vision leads some researchers to believe that box jellyfish actively hunt their prey. Since they have no brain, the mechanisms that could make it happen remain unknown.easy 79% about the size of a peanutabout the size of a peanut9%about the size of a wallnutabout the size of a wallnut6%about the size of a coconutabout the size of a coconut3%jellyfish have no brainjellyfish have no brain79%Created by: Paul Caspack. Statistics based on 13539 answers in 4 languages »nature riddles » What color is octopus blood?Blue. Both squids and octopuses have blue blood. They use an oxygen-carrying molecule in their blood called hemocyanin that contains copper. In cold conditions with low oxygen pressure, hemocyanin oxygen transportation is more efficient than hemoglobin oxygen transportation.very easy 80% redred8%blueblue80%greengreen6%yellowyellow4%Created by: Kasia. Statistics based on 25843 answers in 2 languages »blood riddles » Play nature quiz and see all the questions.