Saltwater fish can’t survive in freshwater because their bodies are highly concentrated of salt solution (too much for freshwater). The water would flow into their body until all their cells accumulate so much water that they bloat and die eventually.

Salt Water Fish Surrounded by salt water, their bodies contain a relatively lower concentration of salt than the ocean water. In this case, osmosis causes the fish to constantly lose water in order to equalize salt concentration inside and outside the fish.

When a saltwater fish is near or exposed to freshwater, the water flows into them filling up cells and either the cells burst, or they stop working. Saltwater fish die in freshwater due to overhydration, and freshwater fish die in saltwater due to dehydration.

Soaking in Salt Most fish that live in the ocean tend to lose water–the high salt content of the ocean causes water to constantly flow out through the fish’s gills. And because seawater is so salty, they also must pump out the excess salt, both through their kidneys and using specialized cells in their gills.

Just like any other pet, fish can become bored, too. And while they won’t chew up your shoes, keeping them occupied will ensure they live a healthier life. Bettas particularly enjoy moving them around the tank, but just about any fish will be curious enough to check it out.

“The ice cover closes them off from the air, so when the pond is ice-covered the fish consumes all the oxygen and then it switches over to the alcohol.” The longer they are in freezing, airless conditions the higher the alcohol levels in the fish become.

10 to 12 hours

The answer is, yes, if you leave it on all the time. Tank lighting should be left on for no more than 12 hours per day. All fish require periods of darkness, similar to their natural aquatic environments. Leaving your tank light on 24/7 will result in the overgrowth of algae and possibly harm the fish.

Signs of a Happy Goldfish Your goldfish should be swimming constantly and not floating, bobbing or sinking. They should eat regularly and eliminate their waste frequently. Provide some variety in your fish’s diet. Pellets everyday can become boring.

To answer the question: Yes, goldfish can live alone. In fact, many goldfish can live long, healthy, happy lives all on their own. Just remember though, not all goldfish will be happy on their own, and some would prefer the company of other tank mates.

While it’s true that goldfish can tolerate algae and muck to a certain degree, they will go into partial hibernation if their water becomes too cold. While it’s unlikely that such conditions would occur in a bowl, the fish would react by sitting still at the bottom.

What do goldfish eggs look like? Unfertilized eggs will look milky white, while fertilized eggs are a transparent yellow. After two or three days, look for a small, dark spot and a curved black line in the egg, which are the eye and spine of the developing fry.

There is no definite time that the goldfish stays pregnant but they carry the eggs until they are fertilized by the male. After release and fertilization, goldfish eggs hatch within two to seven days with the right water conditions and requirements.

Here are some common reasons why a goldfish dies after a water change: Chlorine, chloromines, or heavy metals in the new water (due to lack of a proper water conditioner) Temperature shock (more than 2 degrees difference can cause stress or even death) Drastic change in pH of the water source from the tank.

about 10-15 years