Custom Species Lists
- Loy thompsoni
- Lucina tenuisculpta
- Lucinidae
- Lucinoma annulatum
- Lumbrineridae
- Lumbrineris californiensis
- Lumbrineris cruzensis
- Lumbrineris inflata
- Lumbrineris latreilli
- Lumbrineris limicola
- Lumbrineris pallida
- Lumbrineris similabris
- Lumbrineris sp
- Lumbrineris zonata
- Lunatia pallida
- Lyonsia californica
- Lyonsia sp
- Lysianassidae
- Lysilla loveni
- Lysippe labiata
- Lysippe sp
- Macoma acolasta
- Macoma calcarea
- Macoma carlottensis
- Macoma elimata
- Macoma golikovi
- Macoma indentata
- Macoma lipara
- Macoma moesta
- Macoma sp
- Macoma yoldiformis
- Macrochaeta pege
- Macrocystis integrifolia
- Mactridae
- Mactromeris polynyma
- Maera danae
- Maera sp
- Magelona berkeleyi
- Magelona hobsonae
- Magelona longicornis
- Magelona sacculata
- Magelona sp
- Magelonidae
- Majid (spider) crab
- Majidae
- Malacoceros glutaeus
- Maldane sarsi
- Maldane sp
- Maldanella robusta
- Maldanella sp
- Maldanidae
- Maldaninae
- Malmgreniella bansei
- Malmgreniella berkeleyorum
- Malmgreniella liei
- Malmgreniella macginitiei
- Malmgreniella nigralba
- Malmgreniella scriptoria
- Malmgreniella sp
- Manayunkia aestuarina
- Margarites pupillus
- Margarites sp
- Margarites sp.
- Marsupella bolanderi
- Mastocarpus agardhii
- Mastocarpus alaskensis
- Mastocarpus intermedius
- Mastocarpus latissimus
- Mastocarpus pachenicus
- Mastocarpus papillatus
- Mastocarpus rigidus
- Mastocarpus vancouveriensis
- Mayerella banksia
- Mazzaella affinis
- Mazzaella californica
- Mazzaella flaccida
- Mazzaella japonica
- Mazzaella linearis
- Mazzaella minima
- Mazzaella oregona
- Mazzaella parksii
- Mazzaella phyllocarpa
- Mazzaella rosea
- Mazzaella sanguinea
- Mazzaella sp.
- Mazzaella splendens subsp. fulgens
- Mazzaella volans
- Mediomastus ambiseta
- Mediomastus californiensis
- Mediomastus sp
- Megalomma sp
- Megalomma splendida
- Megalorchestia pugettensis
- Megamoera borealis
- Megamoera dentata
- Megamoera sp
- Megamoera subtener
- Megayoldia thraciaeformis
- Meiodiscus concrescens
- Meiodiscus spetsbergensis