measuring fish

RockabillyChick

RockabillyChick

Kilt-lifter
Nov 5, 2005
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Washington state
when you measure a fish, do you measure from their nose, to the tip of their tail fin, or from their nose, to the base of their tail fin.

would you take measurement A, or measurement B to be the correct length of the fish?

Hemigrammus_erythrozonus_s.jpg
 
I would say include the tail length as well, but if you're wondering about this for the "1 inch of fish per gallon" rule, don't listen to that, its not true
 
I suppose it depends on what you are measuring.

If you are measuring for food reasons, only use the body, no fins.
If it is for knowing how big a fish gets, I believe they too are only talking about body size and not fins ...or else a betta would be listed as much longer than they are.
 
i'm just trying to figure out if my largest glowlight tetra is full grown or not. without tail, she's about 1.25" long, with tail, she's 1.5" long. i always heard they get about 1.5" long....but i'm not sure how they were measuring....
 
B for the 'rules' as only body size contributes to bioload... makes sense, no?

A for if its worthy of takin home for the fryin pan (DNR regulations)

(yeah, i fish and keep fish)

nice question

:cool:
 
Agree with Ras. Also, it's worth noting that within G&F standards, the correct measurement for calculating body weight and health, you actually use a modification of A, with the tail fin pinched down to a point, rather than the natural flare. However, length alone is not a good standard for determining if the fish is an adult, since the conditions they are in will greatly affect growth. If the fish in in clean, healthy water with little or no stress, I fully expect my fish to EXCEDE their natural size by a few percentage points.
 
there are two measurements total length(TL) which is from the nose to the ends of the cadual fins. and standard length(SL) which is from the nose to the end of the cadual preduncle wher the actual body and cadual fin begins-Anne
Standard length is used in scientific descriptions because finnage can be variable
 
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