Periwinkles survive in extreme colds because they are part of the evergreen family.
If you are considering putting periwinkles into your saltwater reef tank, don't. Though they are of no danger to your inhabitants, periwinkles are cold water snails. Yes, they can live in 82 degree tide pools for limited amounts of time, but they will NOT survive more than 3 months in your aquarium. Periwinkles are typically bought in bulk online and I'm sure you can imagine what happens to your marine ecosystem when 50-100 snails die within a week of each other.
periwinkles are not going to survive for more than twenty four hours. Bring its loved ones around to it's hospital so they can have one last goodbye
No.
The saltwater crocodile has gills.
yes
cheese
Certain freshwater fish can survive saltwater conditions; examples are black mollies, mono's and scats. All of these fish aren't truly freshwater or saltwater, they are Brackish. Brackish is between freshwater and saltwater, and so these fish are highly adaptable.
A saltwater crocodile would not survive in fresh water. Salt water animals need the salt to keep them alive and to nourish them.
Goldfish are freshwater fish and can not survive in saltwater environments (oceans, etc) They can only survive in freshwater (non saltwater such as ponds, rivers, and lakes).
people eat periwinkles and animals when there hungry
By osmoregulation. Differs by species or type of organism, but they are either osmoconformers or osmoregulators.