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Ecologically, goniatites were limited to environments of normal-marine salinity—as appears to be the case for all cephalopods throughout their history. Goniatites are much more abundant and speciose in sediments that represent called [[Inland sea (geology)|epicontinental]] seas than they are in those that represent the open ocean. Within these inland seas, goniatites' greatest abundance and diversity appears to have been achieved in deeper offshore and [[Oceanic basin|basinal]] environments rather than in nearshore environments. Known nearshore (e.g., [[lagoon]]al) occurrences have generally been ascribed to wash-in of shells from offshore waters.
Due to lack of strong evidence for any particular life mode (e.g., [[benthos|benthic]] [[nekton]]ic, [[plankton]]ic), it remains unclear what resources goniatites were capitalizing on in these offshore environments. Only a few goniatites' full [[wikt:Special:Search/trophic|trophic]] apparatuses have ever been described, and reports of stomach contents in these creatures' fossils remain questionable at best. However, goniatites clearly lacked the calcified jaw apparatuses developed in later [[Ammonitida|ammonites]]; this has been cited as evidence against their having a [[durophagy|durophagous]] (shell-crushing) diet.
== Distribution ==
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