Insect larvae meals are considered a very promising alternative to provide valuable proteins for aqua feeds¹ and food². Insects are highly nutritious, convert feed efficiently to body mass, can be grown on organic side-streams and agricultural by-products, whereas their rearing is described by low water and land requirements and reduced gas emissions³. The European Commission approved the use of processed animal protein from seven insects in feeds for aquaculture and their use is expected to dramatically increase⁴. Although high levels of insect larvae meal inclusion in fish feeds could lead to a slight decrease of juvenile fish performances, recent studies reported positive results in gilthead sea bream (Sparus aurata)⁵ and in crustaceans⁶. Feeding on selected substrates exerted an impact on the nutrient composition of Tenebio molitor larvae, with a high protein content of the substrate usually resulting in a high protein content of the larvae⁷. Further research is needed to gain knowledge regarding its use as an insect-based protein provider for feed and food.