This is fantastic research and very cool pictures.
Clams Convert Air into Food
Trait no longer the domain only of plants
The animals are marine clams called shipworms.
these clams use bacterial symbionts living inside a special organ in their gills to convert dissolved air [which is about 80 percent nitrogen] into the protein they need."
Understanding how these clams make use of this process
gain insights into how plants fix nitrogen
protein made by plants
Using multi-isotope imaging mass spectrometry (MIMS)