Grimothea gregaria

are eaten by

• Global Biotic Interactions: Schroederichthys bivius (Müller & Henle 1838) (Narrowmouth Catshark)
• Global Biotic Interactions: Sebastes capensis (Gmelin 1789) (Cape redfish)
• Global Biotic Interactions: Zearaja chilensis (Guichenot 1848) (Beaked skate)

are preyed upon by

• Global Biotic Interactions: Eleginops maclovinus (Cuvier 1830) (Patagonian blennie)
• Global Biotic Interactions: Discopyge tschudii Heckel 1846 (Apron Ray)
• Global Biotic Interactions: Xystreurys rasile (Jordan 1891)
• Global Biotic Interactions: Galeorhinus galeus (Linnaeus 1758) (Liver-oil Shark)
• Global Biotic Interactions: Pseudopercis semifasciata (Cuvier 1829) (Argentinian sandperch)

prey on

• Global Biotic Interactions: Pleoticus muelleri (Spence Bate 1888) (Argentine red shrimp)