I must say that I dig the brain on sofacoin's cyclops, and the background for the beat is a great idea too. (I think a creature so powerful could be a fair bit larger is all.)
That Cathedrachnus from Catharsix is just brilliant.
It looks the part, the greenstuff is well done and the parts well chosen. And I loved it for the face even before I saw the cup holder.
Isildur... mate that Siren is stunning. It is a cool idea for a creature (and background) and the sculpting is very, very well done.
Hydra's ambassador is well and truly up to usual standard too. I've got a soft spot for cults and so I embrace the background like Isildur's. The face is creeply disturbing. The base/diorama is not only wonderfully done but it also give context to the critter. But most of all of love the 'lines' of the thing. The curly natural tail, smooth carapace and prominent single vents. Soooo much to like here.
My Gravy Train. Well I can't even try to pretend the model is based on anything other than a cheap toy with an awesome face.
I found it ages ago in a $2 shop and bought it with no plans for it, I just knew I had to incorporate it somewhere sometime. So with greenstuffed extra limbs/ feeder tubes, a giant phage digestion tract/ gut/ storage tank and some old bits it was done. But I have always wondered what the terrestrial 'nids did for food. On the hive ships they are fed by the ship herself, but with the exception of hormagaunts and rippers (2nd edition codex for reference), no other beast is fully able to feed itself. So logically there must have been some heretofore unmentioned creature doing the feeding. (It is no surprise I approve of Sanderman's Provisioner fluff too then. What do they say about great minds???
The Clutterbug is somehow kinda cute. I like the idea of their function on the hive ships and it looks brilliant in Harald's paint style. But for some reason the lack of a face and the scything talon rear legs bother me a little. But that shouldn't detract from a simple and quickly made model that has been finished beautifully.
The pheromone tick is a clever idea too. And I like the model, and in a fit of double standards I reckon the lack of a face works quite well here. Same goes for Vonny's super ripper - the Mandibuli. It is quite cute and fills a clear niche in the consumption phase.
And in second round of double standards I reckon the trygon spines-come-talon legs work beautifully on Nuke's spiderling.
The idea is cool (tyranid warp spiders?) and the slurpy sporemine head is striking.
I dig both the of space borne entires too. I've already commented on the models separately, but I also really like the idea of expanding the limited background on space borne tyranids.
(and if neither of you mind I'd like to steal many of the ideas here when I finally get around to building a BFG fleet.)