The larger batoids - Eagle, electric, starry and thornback

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.

This graph offers a comparison of the weights of the four larger ray species, including curves for both female and male thornback ray.

Note ::To use the charts – Mouse over to highlight individual values. Click and drag to zoom. Double-click to zoom back out.

Note ::To use the charts – Mouse over to highlight individual values. Click and drag to zoom. Double-click to zoom back out.