How do fish excrete urine?

These salts are removed through the use of the kidneys whereby they help the fish retain water and actively excrete salts to produce a very concentrated urine. This also means that marine fish do not urinate as much as freshwater fish.

Do fish pee and poop from the same place?

And speaking of fish: Their pee and poop, while not produced in the same prodigious quantities as a whale’s (at least, not all at once), also play an important part in the health of marine life and ocean ecosystems.

What is excreted through a fish’s urine and gills?

Ammonia is the end product of protein catabolism and is stored in the body of fish in high concentrations relative to basal excretion rates. … Ammonia is eliminated from the blood upon passage through the gills.

Do fish pee in rivers?

Although fish are certainly discrete about it, they do! Perhaps the first question is whether fish drink. Freshwater fish will passively intake water from their environment and then, as their insides are saltier than their surroundings, will excrete a diluted urine.

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What type of urine do freshwater fish excrete?

Fish urine is often said to be mainly ammonia, but as Matt Clarke explains, that’s not really 100% accurate… Most people assume that fish urine is made up mainly of ammonia, but fish excrete only 2-25% of their nitrogen waste via their urine. Most is excreted from their gills as ammonia.

Do fishes cry?

“Since fishes lack the parts of the brain that set us apart from the fishes — the cerebral cortex — I doubt very much that fishes engage in anything like crying,” Webster told LiveScience. … “And certainly they produce no tears, since their eyes are constantly bathed in a watery medium.”

What color is fish pee?

Because when it comes to keeping ocean ecosystems in tip-top shape, pee is liquid gold. Without urine from fish, whales and other critters, coral reefs and seagrass meadows would struggle. Kelp forests might wither. And there would be fewer phytoplankton, the microscopic algae that underpin almost all marine food webs.

Do fish get thirsty?

The answer is still no; as they live in water they probably don’t take it in as a conscious response to seek out and drink water. Thirst is usually defined as a need or desire to drink water. It is unlikely that fish are responding to such a driving force.

Do fish have feelings?

Because fishes lack faces like ours, we assume that their mask-like features mean they do not experience feelings. … “But they are sentient creatures with the capacity to feel.”

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Can a fish feel pain?

Fish do not feel pain the way humans do, according to a team of neurobiologists, behavioral ecologists and fishery scientists. The researchers conclude that fish do not have the neuro-physiological capacity for a conscious awareness of pain. Fish do not feel pain the way humans do.

Do ants pee?

Far from being piss-ants, the coloured waste patches showed the lab specimens would only defecate in the corners of their homes. “These patches never contained other waste material such as uneaten food items, or nestmate corpses. Such waste was collected in waste piles outside the nest,” said the researchers.

Do freshwater fish drink water?

Freshwater fish never drink water because their bodies are saltier than the surrounding water. Osmosis draws water into the fish’s body through its skin and gills, unlike saltwater fish, where the water is drawn out of the body.

Do fishes sleep?

While fish do not sleep in the same way that land mammals sleep, most fish do rest. Research shows that fish may reduce their activity and metabolism while remaining alert to danger. Some fish float in place, some wedge themselves into a secure spot in the mud or coral, and some even locate a suitable nest.

Do fish kidneys?

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).

Why do freshwater fish excrete dilute urine?

An example is freshwater fish. The gills actively uptake salt from the environment by the use of mitochondria-rich cells. Water will diffuse into the fish, so it excretes a very hypotonic (dilute) urine to expel all the excess water.

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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. … The cerebellum of cartilaginous and bony fishes is large and complex.

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