Συζήτηση για την αναπνοή και το ιδανικό βάθος νερού

[tsoui]

continuous airbreathers, and most are obligatory οτι τα περισσοτερα βασιζονται στην αναπνοη ατμοσφαιρικου αερα και μονο

Air breathing fish can be divided into obligate air breathers and facultative air breathers. Obligate air breathers, such as the African lungfish, must breathe air periodically or they suffocate. Facultative air breathers, such as the catfish Hypostomus plecostomus, only breathe air if they need to and will otherwise rely on their gills for oxygen. Most air breathing fish are facultative air breathers that avoid the energetic cost of rising to the surface and the fitness cost of exposure to surface predators.[19]
http://en.wikipedia.org/wiki/Fish