Parvocalanus crassirostris (Dahl F. 1894)

are eaten by

• Global Biotic Interactions: Sabellastarte magnifica (Shaw 1800) (giant feather-duster worm)
• Global Biotic Interactions: Palythoa caribaeorum Duchassaing & Michelotti 1860 (caribbean sea mat)
• Global Biotic Interactions: Terrazoanthus minutus (Duerden 1898)
• Global Biotic Interactions: Nicidion mutilata (Webster 1884)
• Global Biotic Interactions: Orbicella annularis (Ellis & Solander 1786) (Lobed Star Coral)

are preyed upon by

• Global Biotic Interactions: Rhincalanus nasutus Giesbrecht 1888
• Global Biotic Interactions: Scomber japonicus Houttuyn 1782 (Pacific Chub Mackerel)
• Global Biotic Interactions: Membras martinica (Valenciennes 1835) (Rough Silverside)
• Global Biotic Interactions: Clione limacina (Phipps 1774) (Sea Angel)
• Global Biotic Interactions: Etheostoma olmstedi Storer 1842 (Tessellated Darter)

eat

• Global Biotic Interactions: Striatella unipunctata
• Global Biotic Interactions: Centropages furcatus (Dana 1849)
• Global Biotic Interactions: Penilia avirostris Dana 1849
• Global Biotic Interactions: Guinardia striata
• Global Biotic Interactions: Gossleriella tropica

prey on

• Global Biotic Interactions: Acartia (Acanthacartia) tonsa Dana 1849
• Global Biotic Interactions: Ectocyclops phaleratus
• Global Biotic Interactions: Alteutha depressa (Baird 1837)
• Global Biotic Interactions: Temora stylifera (Dana 1849)
• Global Biotic Interactions: Acetes americanus Ortmann 1893