B works better because it stays more cautious and plausible. A sounds too certain about a species-level ID from one beach photo, while B gives a more believable match and explains it without overstating confidence.

Option B is the stronger choice because it takes a more careful and realistic approach. Option A comes across as overly confident when trying to identify a specific species from just a single beach photograph, whereas Option B provides a reasonable identification while clearly explaining its reasoning without making exaggerated claims about certainty.