Under what condition, the upright pyramid of biomass becomes inverted?

Pyramid of biomass is inverted in :

Pyramid of biomass is inverted in :

The pyramid of biomass in sea is also inverted, why?

Why is the pyramid of biomass in sea generally inverted?

Why is the pyramid of biomass in sea generally inverted ?

In which ecosystem is the pyramid of biomass inverted?

(a) ''The pyramid of energy is always upright.' Explain. (b) Explain with the help of labelled diagrams, the difference between an upright pyramid of biomass and an inverted pyramid of biomass.

(a) ''The pyramid of energy is always upright.' Explain. (b) Explain with the help of labelled diagrams, the difference between an upright pyramid of biomass and an inverted pyramid of biomass.