| Answer | Crossword Clue |
|---|---|
| platyhelminth | An invertebrate of the phylum Platyhelminthes; a flatworm |
| platyhelminths | An invertebrate of the phylum Platyhelminthes; a flatworm |
| hemichordate | A marine invertebrate of the phylum Hemichordata; an acorn worm |
| poriferan | An aquatic invertebrate animal of the phylum Porifera; a sponge |
| hemichordates | A marine invertebrate of the phylum Hemichordata; an acorn worm |
| poriferans | An aquatic invertebrate animal of the phylum Porifera; a sponge |
| phoronid | any member of the invertebrate phylum Phoronida, wormlike marine animals living in a chitinous tube and having an anterior structure bearing ciliated tentacles for feeding |
