What did it weigh?
Weighing fish by measuring them helps minimize any potential harm to the fish.
Although there is no doubt that fish can have different weights for the same length dependent on several factors – whether they are gravid, post spawning, sick or healthy, have good access to food-stocks etc., weight estimation based on a fish’s length offers a credible alternative to physically weighing them and helps reduce any potential damage to the fish.
We have developed a series of interactive weight for length (disc width for rays and skates) curves which will not only enable you to ‘weigh’ a particular fish but also gain an insight as to how weight varies by species.
NB:: The weights are guidelines, not absolutes. The graphs and tables are based on 1000’s of observations made by a variety of scientific bodies over the past three decades or so using standard fish up to large, but seldom extraordinary, sizes (because there are so few extraordinary fish !).
The calculators are based on 1000′s of observations made by a variety of scientific bodies over the past three decades or so, however, if anyone has any historic accurate records of weight / length for any species, they could be very useful in refining the models – just use the ‘Contact Us’ page.
Note:: Disc Width is used for rays