mantis

Yes
yes, rather easily.
not a good food source. Marine animals and Freshwater animals have different evolutions and as a result they aren't constituted the same. As a result they also have different nutritional needs and one will not live well on the flesh of the other. The fatty conposition of freshwater animals will cause liver diesase in marine animals. Best bet is to feed things like Krill, Silversides, saltwater mussels, and other marine feeds. So setting up a breeding colony of freshater snails is not the way to feed a mantis shrimp.
 
oooh.... hate to disagree, but FW fish should definately not be given to SW animals because of the high fat conent.....but FW inverts (FW shrimp at least) seem to have the opposite problem. They are surprisingly low in fat, and unforunately other nutrition also. Theoretically if one fortified (gut loaded) FW organisms they would be nutritionally acceptable, but marine organisms are without a doubt always better. Also I am wondering if inverts can even get fatty liver disease, or if they process the excess fat in different ways.....
 
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