You got it right: around ~70 billion land animals in 2013, 1-2.7 trillion fishes [0] and 25 trillion shrimps [1]

But can you compare: - a fish that lived 1 year wild then died by pressure or asphyxia in a net during 15 minutes - a chicken that lived 40 days in a cage

Instead of raw count, the Welfare Footprint Institute [2] propose a framework:

> quantify animal welfare by systematically measuring animals’ affective experiences—specifically, the intensity and duration of their negative (painful) and positive (pleasurable) states […]

0 https://considerveganism.com/counter/

1 https://rethinkpriorities.org/research-area/shrimp-the-anima...

2 https://welfarefootprint.org/analytical-approach/