Robuta

https://www.bas.ac.uk/data/our-data/publication/trophic-structuring-of-modularity-alters-energy-flow-through-marine-food/
energy flowtrophicstructuringmodularityalters
https://www.sciencelearn.org.nz/resources/3086-investigating-toxins-and-bioaccumulation-in-marine-food-webs
Very tiny phytoplankton cells (a type of microscopic algae) can produce potent toxins. Although the toxin produced by one phytoplankton cell is pretty minimal,...
marine food websinvestigatingtoxinsbioaccumulation
https://www.bas.ac.uk/data/our-data/publication/roles-of-krill-in-marine-food-webs-the-southern-ocean/
marine food webssouthern oceanroleskrill