Hemigrapsus crenulatus (H. Milne Edwards 1837)

are eaten by

• Global Biotic Interactions: Mustelus lenticulatus Phillipps 1932 (Gummy Shark)

are parasitized by

• Global Biotic Interactions: Profilicollis novaezelandensis Brockerhoff & Smales 2002
• Global Biotic Interactions: Profilicollis novaezelandensis Brockerhoff & Smales 2002
• Global Biotic Interactions: Profilicollis antarcticus Zdzitowiecki 1985
• Global Biotic Interactions: Maritrema novaezealandense Martorelli, Fredensborg, Mouritsen & Poulin 2004

are preyed upon by

• Global Biotic Interactions: Anarhynchus obscurus aquilonius
• Global Biotic Interactions: Larus novaehollandiae (red-billed gull)
• Global Biotic Interactions: Phalacrocorax melanoleucos (little pied cormorant)
• Global Biotic Interactions: Cominella glandiformis (Reeve 1847)
• Global Biotic Interactions: Halicarcinus whitei (Miers 1876)

are symbionts of

• Global Biotic Interactions: Profilicollis novaezelandensis Brockerhoff & Smales 2002
• Global Biotic Interactions: Maritrema novaezealandense Martorelli, Fredensborg, Mouritsen & Poulin 2004
• Global Biotic Interactions: Curtuteria australis Allison 1979
• Global Biotic Interactions: Profilicollis antarcticus Zdzitowiecki 1985

have endoparasite

• Global Biotic Interactions: Profilicollis novaezelandensis Brockerhoff & Smales 2002

prey on

• Global Biotic Interactions: Hemigrapsus crenulatus (H. Milne Edwards 1837)
• Global Biotic Interactions: Perrierina turneri
• Global Biotic Interactions: Austrovenus stutchburyi (W. Wood 1828)
• Global Biotic Interactions: Buccinulum pertinax (Martens 1878)
• Global Biotic Interactions: Zeacumantus subcarinatus (G. B. Sowerby II 1855)