Can fishes pee?


Fish have kidneys which produce urine containing ammonium, phosphorus, urea, and nitrous waste. The expelled urine encourages plant growth on coral reefs; downstream benefits also include increased fertilization of algae and seagrass, which in turn provides food for the fish.

Do fishes bladders pee?

A urinary bladder is present in fish as an expansible part of the urinary duct, in amphibians and bladder-possessing reptiles (Sphenodon, turtles, most lizards) as a pocket in the cloaca.

How often do fishes pee?

All of them filter out the waste products and help the fish live a healthy life. However, one big difference between fish and other living beings is the frequency of their excretion. Unlike humans who pee every two to three hours, fish pee once a day.

Do fish get thirsty?

As well as getting water through osmosis, saltwater fish need to purposefully drink water in order to get enough into their systems. Where their freshwater counterparts direct all of the water that comes into their mouths out through their gills, saltwater fish direct some into their digestive tract.

Can fishes cry?

No, fishes can’t cry and can’t produce tears. It is often thought that fish may lack the limbic system, but in reality, fishes do have a limbic system, but they lack the biological machinery to produce tears.

Do fish have feelings?

Nerves, brain structure, brain chemistry and behaviour – all evidence indicates that, to varying degrees, fish can feel pain, fear and psychological stress.

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Do fish pee and poop from the same place?

How do Fish poop and pee? Fish pee and poo through their gills and skin. Some also pee and poop through a small opening known as a pore, located at the body’s rear end.

What animal does not pee?

Birds convert nitrogen to uric acid instead: this is metabolically more costly but saves water and weight, as it is less toxic and doesn’t need to be diluted so much. Birds therefore don’t have a urethra, and don’t pee – all waste leaves via the anus.

Why do fish pee when caught?

Saltwater varieties excrete most urine through the gills, while freshwater fish do so through the urinary pore. Saltwater fish take in a great deal of salt and must excrete it. Freshwater fish have to get rid of all the water they take in.

How do fishes excrete?

The primary excretory organ in fishes, as in other vertebrates, is the kidney. In fishes some excretion also takes place in the digestive tract, skin, and especially the gills (where ammonia is given off).

Do fish get bored?

Fish-keepers sometimes see their pets ‘glass surfing’ – swimming repeatedly up and down the glass of the tank. This could be the aquatic equivalent of the pacing of a captive tiger that’s bored from a lack of stimulation. But the fish could also be stressed from an overcrowded or unfamiliar tank.

Can fishes feel pain?

“Fish do feel pain. It’s likely different from what humans feel, but it is still a kind of pain.” At the anatomical level, fish have neurons known as nociceptors, which detect potential harm, such as high temperatures, intense pressure, and caustic chemicals.

Can a fish sneeze?

Answer: Fish cannot sneeze; in order to sneeze you must be able to breathe, to breathe you have to have lungs and nasal passages. They don’t have lungs, they have oxygen transference in their gills.

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Do fishes poop?

So, how do fish expel their feces? Well most of them will expel their feces through an anal vent (also called a cloaca), which is simply an opening for all wastes to leave the body. This includes not only feces but also urine, reproduction, and sometimes eggs or sperm if needed.

Do fish ever shut their eyes?

Actually, they can’t close their eyes because they lack eyelids. Some species continue to float along and will occasionally move a fin to keep oxygen flowing into their gills. These subtle movements are also meant to help them stay balanced.

Can fish hear your voice?

However, yes, they can hear your voice. They can associate sounds with action, though. For example, if you are to say your betta fish’s name – let us call him George – each time you sprinkle food in his aquarium, he will eventually associate the sound of “George” with food.

Do fishes blood?

Fish have blood and it is red in color. fish have a red pigment called hemoglobin that is responsible for the red color. Similar to humans, fish have a circulatory system with blood and a heart that acts as a pump. A fish’s whole body weight is around 10% of its blood.

Do fish recognize you?

A species of tropical fish has been shown to be able to distinguish between human faces. It is the first time fish have demonstrated this ability.

Can fish see in dark?

Fish living in the deep sea manage to navigate in complete darkness. It’s not strictly ‘seeing’ but fish have rows of pressure-sensitive organs running down each side of their body called the lateral line, which allows them to sense nearby animals from the pressure changes in the water.

Do fish have brains?

Fish typically have quite small brains relative to body size compared with other vertebrates, typically one-fifteenth the brain mass of a similarly sized bird or mammal.

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Do all fish have a heart?

Heart: Fish have a two-chambered heart. Human hearts are four-chambered. Blood is pumped by the heart into the gills. Blood returns to the heart after going through the organs and muscles.

Can fishes cry?

No, fishes can’t cry and can’t produce tears. It is often thought that fish may lack the limbic system, but in reality, fishes do have a limbic system, but they lack the biological machinery to produce tears.

Can a fish drown?

Most fish breathe when water moves across their gills. But if the gills are damaged or water cannot move across them, the fish can suffocate. They don’t technically drown, because they don’t inhale the water, but they do die from a lack of oxygen. Fishing equipment, such as some types of hooks, can damage the gills.

Do fish have feelings?

Nerves, brain structure, brain chemistry and behaviour – all evidence indicates that, to varying degrees, fish can feel pain, fear and psychological stress.

Do spiders pee?

Spiders don’t produce urine like we do, but produce uric acid, which doesn’t dissolve in water and is a near-solid. Spiders have this alternate form of waste because they can’t afford to lose as much water as we do.

Do ants pee?

No, ants do not pee. In fact, most insects don’t pee. All the waste that needs to be expelled comes out of one hole as one waste. Their poops aren’t wholly solid, though, because there is a moistness to them due to liquid content.

Leigh Williams
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