In soft tissues, crepitus can be produced when gas is introduced into an area where it is normally not present. The term can also be used when describing the sounds produced by lung conditions such as interstitial lung diseaseâthese are also referred to as rales.
Bloodfin Tetra-Information about keeping and breeding Bloodfin Tetras in aquariums. Breeding the Black Tetra-Breeding notes for Gymnocorymbus ternetzi. Cardinal Tetra Fish-An introduction to Cardinal teras-Paracheirodon axelrodi. Cardinal Tetra-Information about all aspect of keeping and breeding Cardinal Tetras.
Appearance. Size: Tetras grow to approximately 1Â¼ inches in length. Females have slightly larger stomachs than males. Color: Neon tetras have fairly standard colorization, which includes a light metallic-blue back and a silver-white underbelly. Two iridescent stripes are seen on the body as well: one blue, one red.ank Care: Neon tetras are easy to keep, but make sure to get an aquarium that's big enough to house a group of them. Choose a tank that's at least 24 inches in width. The tetra prefers slightly acidic water, so aim for a pH level between 5.0 and 7.0.