It nice to see so many people who find cephalopoda as interesting as i do.
I am doing a zoology degree at University of Derby and just wrote an essay on them. I found that they were so weird and wonderful, think more people need to appreciate how cool cephalopods and all inverts can be.
Not sure why they fed infrequently, may be due to parasite burden or ammonia problems.
Kent Marine (Other good companies are available... haha) have a supliment called Garlic Extreme which triggers the feeding response on Seahorses (Much like cats) but be warned, if you get any then please under no circumstances smell it... won't do anything for your appitite, in fact you may even see your lunch again!
Uni of Derby was well nice with I had a look a few years ago, went to Hull's Campus in Scarborough and did Marine Biology, was fantastic! Good luck for the course and if you need anything give me a shout!
Phil, i've got plenty of people who own trawlers off Scarborough and Whitby, shouldn't be a problem if you would like to arange something!