Already mentioned but here's the new Spinosaurus paper with additional links:
Free pdf:
The giant theropod Spinosaurus was an unusual animal and highly derived in many ways, and interpretations of its ecology remain controversial. Recent papers have added considerable knowledge of the anatomy of the genus with the discovery of a new and much more complete specimen, but this has also brought new and dramatic interpretations of its ecology as a highly specialised semi-aquatic animal that actively pursued aquatic prey. Here we assess the arguments about the functional morphology of this animal and the available data on its ecology and possible habits in the light of these new finds. We conclude that based on the available data, the degree of adaptations for aquatic life are questionable, other interpretations for the tail fin and other features are supported (e.g., socio-sexual signalling), and the pursuit predation hypothesis for Spinosaurus as a âhighly specialized aquatic predatorâ is not supported. In contrast, a âwadingâ model for an animal that predominantly fished from shorelines or within shallow waters is not contradicted by any line of evidence and is well supported. Spinosaurus almost certainly fed primarily from the water and may have swum, but there is no evidence that it was a specialised aquatic pursuit predator.
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Blogs:
The evidence for Spinosaurus being a specialist aquatic predator and good swimmer is weak
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CrocoZilla vs Hell Heron (in Italian)
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News:
Study sheds new light on the behaviour of the giant carnivorous dinosaur Spinosaurus as a monstrous heron