. The complete aquarium book; the care and breeding of goldfish and tropical fishes. Aquariums; Goldfish. 98 FISH ENEMIES of propulsion through the water is peculiar, being brought about by a series of expulsions of water from the rear end. This enables them to make a very sudden leap towards a victim. The "mask," shown in Figure 74, when not in use is folded before and under the head. Dragon Fly larvae are strictly carnivorous at all periods and will attack any pond creature reasonably near their own size. If given enough time a single individual will destroy an entire hatching of f
. The complete aquarium book; the care and breeding of goldfish and tropical fishes. Aquariums; Goldfish. 98 FISH ENEMIES of propulsion through the water is peculiar, being brought about by a series of expulsions of water from the rear end. This enables them to make a very sudden leap towards a victim. The "mask," shown in Figure 74, when not in use is folded before and under the head. Dragon Fly larvae are strictly carnivorous at all periods and will attack any pond creature reasonably near their own size. If given enough time a single individual will destroy an entire hatching of fishes, growing by what it feeds upon so as to be able to devour the remaining fishes which are also becoming larger. Predaceous Diving Beetle (Dytiscus). Fortunately this beetle is of such size that it can scarcely escape notice, especially as it is obliged. Fig. 75. Predaceous Diving Beetle (Life size) to come to the surface for air, which it takes at the end of the abdomen. It is rapacious in extreme degree and is a good swimmer. A large specimen was once placed in an aquarium for observation. It so quickly attacked a goldfish that the scales fell in a small shower and the fish died before it could be rescued. They are usually of such a dark brown as to appear black, but are sometimes bordered with yellow. Water Scavenger Beetle (Hydrophilidce). We mention this beetle here because of its resemblance to the large predaceous diving Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Innes, William T. (William Thornton), 1874-1969. New York, Halcyon house
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