curve

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

helena

Assassin Snail.

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