. The complete aquarium book; the care and breeding of goldfish and tropical fishes. Aquariums; Goldfish. FISH ENEMIES 97 which it sucks enough blood to kill its victim and then wantonly goes after another. In this way a single individual may kill an entire hatching of fish over night. This larva can usually be recognized by its spindle-shaped body; flat, strong head; pale translucent brown color and a steady progress through the water, coming to the surface frequently to breathe a moment through the rear end. Although growing to a length of 2Y2. inches, at which time it attacks larger fishes
. The complete aquarium book; the care and breeding of goldfish and tropical fishes. Aquariums; Goldfish. FISH ENEMIES 97 which it sucks enough blood to kill its victim and then wantonly goes after another. In this way a single individual may kill an entire hatching of fish over night. This larva can usually be recognized by its spindle-shaped body; flat, strong head; pale translucent brown color and a steady progress through the water, coming to the surface frequently to breathe a moment through the rear end. Although growing to a length of 2Y2. inches, at which time it attacks larger fishes and any small aquatic animals, it is the smaller sizes with which we are principally concerned. From a length of l/\ to 1 inch they are not so easily seen, but are capable of doing great mischief. Spearmouth. While not quite so common as the Water Tiger, its habits are similar and it grows to an even larger size, reaching 3 Fig. 72. Spearmouth (Life Size) The body is thicker and the mandibles are shorter. From the aquarist's standpoint both these larvae could be classed as one. The Spearmouth is the larva of the large Water Scavenger Beetle (Hydrophilus). Dragon-Fly Larvae. Almost everyone who raises fish outdoors is familiar with these unpleasant individuals. There are two reasons why they are difficult to altogether avoid. When newly hatched they are very small and will go through the same strainer as daphnia; furthermore, the mother Dragon Fly (Odonata) is an excellent flier and may deposit her eggs in any body of water that provides proper facilities for her needs. These larvae live more by their cunning than by any agility as. 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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