Bettas livebearers goldfish cichlids saltwaters
saltwater crocodiles live on australia on saltwater rivers or swamps,some saltwaters have also been found in asia and the philipines
Well salwater crocodiles grow up to be around 22 feet+ while the nile grows up to be around 20 feet maybe smaller. Saltwaters and Nile crocodiles are equaly agressive they can both kill very large animals. However the size and strength of a Saltwater will make it a victor over the Nile crocodile. And the fact that Saltwater crocodile kills more people in middle eastern then Nile crocodile kills more people near the Nile river(worlds longest river).
The melting of ice caps leads to rising sea levels, which can result in coastal flooding, erosion, and displacement of people living in low-lying areas. It also disrupts ecosystems, contributing to habitat loss for polar animals and altering ocean currents and weather patterns. Additionally, the release of trapped methane gas from melting ice can further exacerbate global warming.
In a river,flowing water exerts a force on the swimmer. To cross the river or to swim upstream the swimmer has to overcome this resistive force. This requires spending a lot of energy. As there is no flow of water in a swimming pool, the swimmer does not have to overcome the resistive force as in river. Hence it is easier to swim in swimming pool than in a river.