These are 50 centimeters long, and Alphluks' maximum size is 4 mm (0.4 cm), making it more than 50 times bigger. For comparison, Carolina anoles, a common green lizard in the U.S., are about 8 cm long as a maximum, and webworm moths (a lawn-living moth used as a generic "moth" for this example) is 2.54 cm long, so the predator is about 3.14 times bigger.
That Aphluks are sorted third on the diet list suggests it's a big part of the diet or highly preferred. Unless they have a way to very efficiently eat large quantities of Aphluks, as a blue whale eats krill, it would surely be put farther down the list, removed entirely, or specified as a food only for tiny stages of their young. In the last case, it would be useful to specify the average size at hatching. Since the larvae and adults have different lifestyles, it would be useful to separate the diet listings.