. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. 140 LIVING FISHFOODS grown fishes and should be taken as opportunity offers. They are found principally in small streams, under stones and around decaying wood. Placed in a large aquarium or tank with plenty of vegetation they will multiply rapidly. Water-Asel (Asellus) is found in still or slowly moving water, usually in the mud or clinging to vegetation. It cannot move rapidly. Fig. 130. Water Asel (Enlarged three times) like Fairy Shrimp, but both are enemies of very sma
. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. 140 LIVING FISHFOODS grown fishes and should be taken as opportunity offers. They are found principally in small streams, under stones and around decaying wood. Placed in a large aquarium or tank with plenty of vegetation they will multiply rapidly. Water-Asel (Asellus) is found in still or slowly moving water, usually in the mud or clinging to vegetation. It cannot move rapidly. Fig. 130. Water Asel (Enlarged three times) like Fairy Shrimp, but both are enemies of very small fry and both are greedily taken as food by larger aquarium fishes, although the shrimp move so rapidly that highly developed goldfishes have trouble in catching them. Infusoria and Rotifera. Of prime importance as food for very small fishes are the Infusoria and other microscopic creatures of still water. Some idea of their minuteness may be had when it is pointed out that '^^^S^ Fig. 131 Asplanchnopus myrmeleo Fig. 132 Pterodina patina Fig. 133 Notcus quadraeornis Typical Rotifers (Greatly magnified) they are the natural food of cyclops and other small crustaceans. All except the very largest of the infusorians will pass through ordinary cheesecloth nets, but silk bolting-cloth of fine texture will hold those which are large enough to be of real use. Further information on this point is contained on page 51. Other infusoria are shown in Fig. 223. Enchytrae. These are thread-like small white worms usually bred in winter as a substitute for daphnia for feeding to tropical fishes. Gold- fishes are also very fond of them, but it is a difficult matter to cultivate a sufficiently large quantity to satisfy the appetite of several goldfishes. For some of the smaller fishes requiring living food they are almost indispensable in Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearan
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