The bumblebee bat (Craseonycteris thonglongyai) is the smallest mammal by mass, weighing only about 2 grams (0.07 ounces) and with a wingspan of 15 cm (5.9 inches), making it lighter than a penny.

Cuvier's beaked whale (Ziphius cavirostris) holds the record for the deepest and longest dive among mammals, reaching depths of nearly 3,000 meters (9,816 feet) and staying submerg...

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The gray whale (Eschrichtius robustus) undertakes one of the longest annual migrations of any mammal, traveling up to 20,000 km (12,430 miles) round trip from Arctic feeding ground...

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The colossal squid (Mesonychoteuthis hamiltoni) is the largest invertebrate by mass and possesses the largest eyes in the animal kingdom, reaching up to 27 cm (11 inches) in diamet...

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The startle reflex in some fish, like the Mauthner reflex, allows them to react to threats and initiate an escape maneuver in less than 5 milliseconds, making it one of the fastest...

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The froghopper (Philaenus spumarius) can jump up to 70 cm (27.5 inches) high from a standstill, representing a vertical acceleration of 400 times gravity, making it the highest jum...

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