Giant killer squid of the Triassic?

We hypothesize that the shonisaurs were killed and carried to the site by an enormous Triassic cephalopod, a 'kraken,' with estimated length of approximately 30 m, twice that of the modern Colossal Squid

-- from here.

P Z Myers is sceptical :

This 'Triassic kraken' has not been found; no fossils, no remains at all, no evidence of its existence. It is postulated to have been large enough to hunt and kill ichthyosaurs, which is remarkable—comparison to modern giant squid is invalid, since they are prey, not predator.

P.S. 11 Oct: Microecos has some fun, but Nature does not dismiss the idea out of hand.

Glass reef

This glass sponge (class Hexactinellida) created dense reefs in ancient seas that were shallow and warm. "The delicate animals were thought to exist only as fossils", says an article about a new illustrated Atlas of the Oceans, "until explorers in the 1990s discovered large reefs of living relics." The Sponge Reef Project says:

Siliceous sponge reefs or mudmounds occur several times in Earth history and they culminate in the Late Jurassic where they formed a discontinuous deep-water reef belt extending more than 7000 km. This reef system was the largest biotic structure ever built on earth. The largest reef of today, the Great Barrier Reef in Australia (2000 km), is relatively small compared to the Jurassic sponge reef belt.