WebA 4.5 kg puffer fish expands to 40% of its mass by taking in water. When the puffer fish is threatened, it releases the water toward the threat to move quickly forward. What is the ratio of the speed of the puffer fish forward to the speed of the expelled water backwards? Note: the answer in the book say ( 2:4 ) but, I don't know how to get it ? WebDec 4, 2014 · The researchers stimulated the fish by gently suctioning, which caused them to puff up to about four times their normal size. Then, they measured the amount of …
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WebFeb 10, 2024 · The upside-down jellyfish points its stinging cell-filled tentacles toward the water column to capture prey and deter predators. Video by Lena van Giesen Scientists analyze stinging response on a … WebApr 24, 2024 · Even if a predator fish tears away the structure in its haste to flee, the jaws remain embedded, and the venom sac keeps pumping irritating toxins into the fish's flesh. The head of a pedicellaria ... lids king hardwood classic hat
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WebFeb 12, 2024 · 2. Animal Decoys – Simple But Effective. We think that using animal decoys is one of the best options for keeping birds and other predators away from your fish pond (this decoy is our top pick).This is the same theory as a farmer putting a scarecrow in a field to keep crows and other birds away, or like using a statue of an owl on your balcony to … WebSep 30, 2024 · Leeches are actually segmented worms that grow up to eight inches long. Depending on their species, they can be predators to other animals, while some species enjoy eating natural vegetation. Some are also parasitic. The carnivorous leeches live off of the blood of fish, birds, amphibians, and mammals. WebJul 14, 2024 · With around 80,000 fishing boats operating in the waters of the Mediterranean, the amount of fish caught is truly staggering. The main target species are small pelagic fishes like anchovy and sardine. Other fish “ common to the traditional Mediterranean Diet ” include flounder, mackerel, tuna, sea bass, and sardine. mclearn for rent near me