- Beroe forskalii
- Beroe ovata
- Blackfordia virginica
- Bolinopsis vitrea
- Boreomysis acuminata
- Boreomysis atlantica
- Boreomysis bispinosa
- Boreomysis illigi
- Boreomysis insolita
- Borgertella caudata
- Botrynema brucei
- Botryocephalina armata
- Botryocyrtis scutum
- Botryopyle dictyocephalus
- Botryostrobus aquilonaris
- Botryostrobus auritus/australis
- Bougainvillia carolinensis
- Bougainvillia frondosa
- Bougainvillia macloviana
- Bougainvillia muscus
- Bougainvillia niobe
- Bougainvillia platygaster
- Bowmaniella atlantica
- Bowmaniella brasiliensis
- Bowmaniella dissimilis
- Bowmaniella inarticulata
- Bowmaniella recifensis
- Brachioteuthis riisei
- Brachycalanus bjornbergae
- Brachyscelus crusculum
- Brachyscelus globiceps
- Brachyscelus macrocephalus
- Brachyscelus rapax
- Bradycalanus gigas
- Bradycalanus pseudotypicus
- Bradycalanus typicus
- Bradyidius plinoi
- Brandtiella palliata
- Brasilomysis castroi
- Brooksia rostrata
- Buccinosphaera invaginata
- Bythotiara capensis
- Bythotiara murrayi
- Caesaromysis hispida
- Calamorhynchus pellucidus
- Calanoides acutus
- Calanoides carinatus
- Calanoides macrocarinatus
- Calanopia americana
- Calanopia elliptica