[Thos] Anything from the animal kingdom that came out of the sea. Fish, shellfish, squids, whatever ... I am far too ignorant to know what fishies live where, so in practice my definition includes freshwater beasties too. Not plant things like seaweed or little planktony things, though, even if they do come from the briny depths. The Blob-style mental image that arises for me is that of a large prawn, FWIW.
[ZK] Don't worry, you're not the only Cambridge reject in the world. ;) You'll find that 40% thing is pretty universal throughout this nation's fine universities, and indeed 40% over the whole degree will bag you an honours degree at most places ("only" a Third, but still ...)

Hello dear Thos. We have a 'seafood' restaurant here and they serve anything that's considered aquatic, including molluscs and crustaceans. Did you know there's an edible sea urchin?
Simulposted with Brendan -but what the hell - I'll press 'submit' anyway .....

Raak] You don't know how close that guess is. As part of the Architecture course we were given design projects which could take anything from a week to a whole term. The end of the process was 'the crit', in front of tutors and a group of students, it was inquisitorial and confrontational, others sailed through the process; me, absolutely terrified and nervous dreaded every single one. A tough crit of hard questioning gave no indication of how well, or how you had done everyone was grilled to the 9th degree.
It sounds bad, but the end result (which almost justified the means) was that you made sure the design process was robust. So, if ever you meet a building designer who seems a little (over)protective of their work....

Thos]Seafood; anything from the salt water sea? but Trout and Salmon could be served in a seafood retaurant, they may be considered fresh water river fish and therefore strictly not 'seafood'.

I've heard the term "seafood" used to refer only to shellfish and the like, and not to fishfish. I have also heard it used pretty broadly to include all fish, including those which have never been near an ocean. I think you can find precedent for whatever you want to argue

[Inkspot] Surely the freshwaterness of salmon depends on where it has been caught? It is a fish that lives in both sea and reiver at different times in its life.

Then again, do they fish for salmon in the sea?

[CdM] This has a disturbing parallel in the number of piscivores and chicken eaters that call themselves vegetarian...