OCEAN GARDENS; 



instances in which the water in glass Aquaria, con- 

 taining Sea-Anemonies, has remained perfectly pure 

 for more than a year. 



The addition of fish, however, imdoubtedly en- 

 liyens the general aspect of an Aquarium very con- 

 siderably ; and many may not grudge the task of 

 daily aerating the water, in order to enjoy the cheerful 

 spectacle of their agreeable and ever- active move- 

 ments. One or two young Plounders, very small, 

 and the young of other species of flat fish, add much 

 interest to an Aquarium, in consequence of their 

 mode of swimming being so different to that of the 

 class of fishes with whose movements the eye is 

 more familiar. 



Among the fish mentioned by the most expe- 

 rienced in the keeping of Sea Aquaria as best 

 suited to that purpose, the first is the pretty little 

 Tansy, Blennius phoUs, with its bright scarlet eyes, 

 and the many changing hues of its body. This little 

 fellow will live and flourish in a tank with a poorer 

 supply of oxygen than any other fish yet tried. 



The fifteen-spined Stickleback, Gasterosteus spi- 

 nachia^ does well, and is very cheerful and brisk 

 in his movements. Three or four would be an im- 

 provement to any tank. 



Young of the gray Mullet, too, do well; for 



96 



