curve

fish
inverts
   arthropods
   cnidaria
   crustacea
   gastropods
     cephalopods
     snails
       Anentome
         helena
       eggs
       Marisa
       mystery
       Nerite
       Notopala
       Paludomus
       ramshorns
       Theodoxus
       Tylomelania
       Vittina
       viviparus
   molluscs
   porifera
   protists
   worms
plants
misc

helena

Assassin Snail.

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