TROPICAL AQUARIUM FISHES 
1i7 
UTRICULARIA 
Many species of Bladderwort are distributed throughout the Temper- 
ate Zone. 
They have somewhat the appearance of the finely-divided 
leaves of Myriophyllum, but may be identified by the small bladders 
dotted throughout. 
Our figure 125 of U. vulgaris gives a good idea of 
the general type. They thrive in the aquarium if given plenty of strong 
light. 
The Bladderworts are carnivorous plants, trapping the micro- 
scopic lower forms of animal life in their bladders, where they are di- 
gested. 
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It has been claimed that they can trap extremely small fishes, 
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Fic, 124. MyRIOPHYLLUM NIETSCHEI (Slightly reduced) 
Fic. 125. 
GREATER BLAppERWORT (Reduced one-third) 
such as the young of Dwarf Gourami, but we do not know that this has 
ever been definitely proven. 
There can be no doubt, however, that the 
plant does take living food which would be useful to young fishes, and to 
that extent is objectionable in the aquarium. 
