Scalpel: A spine which is located on the tail base of surgeonfish (tangs). It is retractable and gives them their name, as it looks very much like a scalpel.
Scalpel Marking A spine which is located on the tail base of surgeonfish (tangs). It is retractable and gives them their name, as it looks very much like a scalpel.
Encyclopedia 1.0 by Rebecca Smallwood ...
The scalpel is also 5 inches (I bought the larger scalpel blades) and has a ridged grip area to ensure you don't cut yourself while cutting those tough stems.
Tangs, commonly referred to as Surgeonfish or Doctorfish, have small scales and one or more scalpel-like spines on each side of the tail. These spines are used in aggression and for defense.
TREATMENT Remove tumors surgically with a scalpel or razor-blade and sterilize area before returning fish to aquarium. Feed as normal. Surgically removed lymphocystis may recur.
When both got to about 1 inch in diameter I bit the bullet & decided to separate them. I broke the skeleton as closely as I could to the middle of the two, and had to cut the tissue with a scalpel to complete the separation.
called a foricula and, you guessed it, some have a foricula that hinges on the right and some on the left. As the picture and drawing on the lower right of a post-mortem mature female illustrates, the foricula, as pried up with the tip of my scalpel, ...
 See also: Fish, Aquarium, Base, Plants, Species
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