A new study offers the first direct evidence that deep-dwelling mesopelagic fish, which account for up to 94% of global fish biomass, excrete carbonate minerals at rates comparable to shallow-water species. The findings validate previous global models suggesting that marine fish are major contributors to biogenic carbonate production in the ocean.



Summary

A recent study provides the first direct evidence that mesopelagic fish, the most abundant type of fish in the ocean, excrete carbonate minerals at similar rates to their shallow-water counterparts. This confirms existing models positing that marine fish are significant producers of biogenic carbonates in the ocean. The research is important because it highlights the role of these deep-sea fish, which constitute the vast majority of global fish biomass, in marine biogeochemical cycles. This supports previous estimates that fish play a crucial role in carbonate production within the ocean.

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