Several changes have occurred in the river environment of Nakdong due to construction multifunctional weirs as part Four Major Rivers Project. This currently exhibits characteristics that are similar those a stagnant water area which depth increases and flow velocity decreases. Consequently, blue-green algae frequently observed. Toxic substances secreted by harmful aquatic ecosystems human body...

Lionfish ( Pterois spp.) evolved in the Indo-Pacific with predators and prey invaded regions (e.g., Caribbean Sea Mediterranean) where no such balance yet exists. In 2020, four lionfish were recorded on mesophotic reefs of Amazon offshore Coast Fernando de Noronha Archipelago. However, until now, there records invasive Brazilian nearshore waters or even a high number individuals. this article, ...