BH, i did not say u dont understand english at all..what i meant was that u dont understand the english used in that abstract, dont get me wrong. dont have to get all edgy and defensive. i think u r confused with the sentence: "Aquaculture production of ornamental species should be avoided when it would replace a harvest of wild animals that maintains habitat, a cultural benefit, or an economic benefit. " i think u r confused with the word harvest. u said " how can harvesting of wild animals maintain habitat?'' what it means is that it would replace a harvest of wild animals. meaning aquaculture should be avoided when it would replace a seasons production of wild animals that maintains habitat, something along those lines. well, congrats on being top in class for english..it clearly shows.