How Do Archerfish Shoot Water?
Archerfish shoot water by using a specialized groove in the roof of their mouth, their tongue, and pressure generated inside the mouth and gill chambers. Together, these structures help form a narrow water jet that can knock insects from vegetation above the water. Archerfish do more than simply squ...
Why Do Male Seahorses Give Birth?
Male seahorses give birth because they have evolved a remarkable form of male pregnancy. During mating, a female transfers her eggs into the male's specialized brood pouch, where the eggs are fertilized and the embryos develop. The father protects the developing young and helps regulate their ox...
How Do Starfish Regrow Their Arms?
Starfish regrow lost arms through a process called regeneration. After an arm is injured or detached, the wound closes, cells near the injured area change their behavior, and new tissues gradually develop. Over time, the growing arm can rebuild its skeletal elements, muscles, nerves, and tube feet....
How Do Electric Eels Produce Electricity?
Electric eels produce electricity using specialized cells called electrocytes, which are arranged in large stacks inside their electric organs. When nerve signals activate these cells, charged ions move across their membranes, creating small electrical differences. Thousands of electrocytes working...
Why Do Flying Fish Fly?
Flying fish leap out of the ocean and glide through the air, primarily as a way to escape predators such as tuna and dolphinfish. They do not fly like birds by flapping wings. Instead, they accelerate underwater, burst through the surface, and spread their enlarged pectoral fins to generate aerodyna...
Can Fish See Water? How Fish Vision Really Works
Fish can see objects, particles, bubbles, light patterns, and boundaries in water, but they probably do not perceive uniformly clear water as a separate visible object. Just as humans normally look through clean air without noticing the air itself, fish see their surroundings through the water aroun...
Do Fish Get Thirsty? How Fish Drink Water
Fish need water to survive, but scientists do not know whether they experience thirst in the same subjective way humans do. Most marine bony fish regularly drink seawater because they lose water to their salty surroundings. Freshwater bony fish face the opposite problem: water continually enters the...
Tripod Fish: The Deep-Sea Fish That Stands on Stilts
The tripod fish is a remarkable deep-sea fish that can stand above the ocean floor using three extraordinarily long fin extensions. One of the best-known species, Bathypterois grallator, rests on two elongated pelvic-fin rays and an extended ray from the lower part of its tail fin. It faces into the...
Do Jellyfish Have Brains? How They Survive Without One
No, jellyfish do not have brains, but they do have nervous systems. Instead of a centralized brain like those found in humans, fish, and many other animals, jellyfish possess networks of nerve cells distributed throughout their bodies. These nerve networks help them sense their surroundings, coordin...
The 10 Most Beautiful Fish in the World
From neon-blue reef fish to giant spotted sharks, the underwater world is packed with species that look almost unreal. Among the most beautiful fish in the world are the mandarin fish, clownfish, betta fish and lionfish, along with other equally stunning marine and freshwater species.Below you’ll f...
Best Small Pets for Kids (Realistic Expectations for Parents)
Many parents in the US and Europe consider getting a “small pet” when their child asks for an animal friend. Hamsters, guinea pigs, rabbits, budgies and even fish are often seen as easier than a dog or cat. But small doesn’t always mean low-maintenance – and no pet is truly “self-care”.This gu...