Species of Pollock (1998) are those that were reported as occurring between Cape Cod and Newfoundland (but not necessarily in the ocean waters surrounding Mount Desert Island). If they were not reported by Procter (1933), they need further examination and potential removal from this checklist. Please send corrections and updates to info@vfthomas.com. Photographs are welcome. Thank you.
| Class | Order | Family | Genus | Specific Epithet | authority | common name | Sources (full citations given after this table) |
| Demospongiae | Hadromerida | Clionidae | Cliona | celata | Grant | sulfur sponge | Procter (1933, p. 114.), Pollock (1998) |
| Demospongiae | Hadromerida | Polymastiidae | Polymastia | robusta | ? | ? | Procter (1933, p. 110.) |
| Demospongiae | Hadromerida | Suberitidae | Suberites | concinnus | Lambe | ? | Procter (1933, p. 109.) |
| Demospongiae | Hadromerida | Suberitidae | Suberites | ficus | (Johnston) | fig sponge | Pollock (1998) |
| Demospongiae | Hadromerida | Suberitidae | Suberites | hispidus | (Johnston) | ? | Procter (1933, p. 106.), Pollock (1998) |
| Demospongiae | Hadromerida | Suberitidae | Suberites | montalbidus | (Johnston) | ? | Procter (1933, p. 108.) |
| Demospongiae | Halichondrida | Halichondriidae | Halichondria | bowerbanki | Burton | yellow sun sponge | Pollock (1998) |
| Demospongiae | Halichondrida | Halichondriidae | Halichondria | fibrosa | Fristedt | ? | Procter (1933, p. 87.) |
| Demospongiae | Halichondrida | Halichondriidae | Halichondria | genitrix | Schmidt | ? | Procter (1933, p. 87.) |
| Demospongiae | Halichondrida | Halichondriidae | Halichondria | panicea | (Pallas) | crumb-of-bread sponge | Procter (1933, p. 86.), Pollock (1998) |
| Demospongiae | Halichondrida | Halichondriidae | Halichondria | sitiens | ? | ? | Procter (1933, p. 88., as Eumastia sitiens) |
| Demospongiae | Poecilosclerida | Acarnidae | Iophon | pattersoni | ? | ? | Procter (1933, p. 104., as Iophon chelifer) |
| Demospongiae | Poecilosclerida | Isodictyidae | Isodictya | deichmannae | ? | ? | Pollock (1998) |
| Demospongiae | Poecilosclerida | Isodictyidae | Isodictya | palmata | ? | palmate sponge | Procter (1933, p. 101., as Homoeodictya palmata), Pollock (1998) |
| Demospongiae | Poecilosclerida | Isodictyidae | Neoesperiopsis | digitata | (Miklucho-maclay) | ? | Procter (1933, p. 94., as Esperiopsis quatsinoensis) |
| Demospongiae | Poecilosclerida | Myxillidae | Myxilla | incrustans | (Esper) | ? | Procter (1933, p. 99.), Pollock (1998) |
| Demospongiae | Poecilosclerida | Myxillidae | Myxilla | fimbriata | (Bowerbank) | ? | Procter (1933, p. 100.) |
| Demospongiae | Poecilosclerida | Microcionidae | Microciona | prolifera | ? | red beard sponge | Procter (1933, p. 104.), Pollock (1998) |
| Demospongiae | Poecilosclerida | Mycalidae | Mycale | lingua | (Bowerbank) | ? | Procter (1933, p. 97.) |
| Demospongiae | Poecilosclerida | Mycalidae | Mycale | ovulum | (Schmidt) | ? | Procter (1933, p. 98.) |
| Demospongiae | Poecilosclerida | Tedaniidae | Tedania | suctoria | ? | ? | Procter (1933, p. 101.) |
| Demospongiae | Haplosclerida | Chalinidae | Haliclona | oculata | (Pallas) | finger sponge | Pollock (1998) |
| Demospongiae | Haplosclerida | Chalinidae | Haliclona | permollis | (Bowerbank) | purple sponge | Pollock (1998) |
| Demospongiae | Haplosclerida | Chalinidae | Haliclona | ecbasis | de Laubenfels | ? | Procter (1933, p. 88., as Reniera cinerea) |
| Calcarea | Leucosolenida | Sycettidae | Scypha | ciliata | (Fabricius) | little vase sponge | Pollock (1998) |
| Calcarea | Leucosolendia | Leucosoleniidae | Leucoselenia | botryoides | ? | organ-pipe sponge | Pollock (1998) |
| ? | ? | ? | Reniera | heterofibrosa | Lundbeck | ? | Procter (1933, p. 89.) |
| ? | ? | ? | Reniera | ventrilabrum | Fristedt | ? | Procter (1933, p. 90.) |
| ? | ? | ? | Reniera | urceolus | (Rathke and Vahl) | ? | Procter (1933, p. 93.) |
| ? | ? | ? | Chalina | oculata | (Pallas) | ? | Procter (1933, p. 93.) |
| ? | ? | ? | Stylotella | simplissima | (Bowerbank) | ? | Procter (1933, p. 102.) |