Parasitic eggs that float in saturated saline

 Fertilised eggs of the following Float in saturated saline:
Remember: Imagine a DWARF holding a WHIP and PINned on ROUND HOOK
i.e. Eggs which Float are Fertilised eggs of:
Dwarf tape worm = Hymenolepis nana
Whip worm = Trichuris trichura
Pin worm =  Enterobius vermicularis
Round worm = Ascaris lumbricoides
Hook worm = Ankylostoma / Necacator



Another alternate mnemonic: I HATE Fertilised eggs - HATE stands for Hook / Hymenolepis, Ascaris, Trichuris, Enterobius.