Ok so here are the fish i really want to put in my tank (once it is set up), and the order i want to put them in it:

1st- Stars and Stripes Puffer (Hawaii) WITH Undulate
Trigger (Bali)

2nd- Yellowhead Moray Eel

3rd- Queen Angel

4th- A Cat Shark like this one -> http://www.saltwaterfishshop.com/product_i...products_id=169

I'm not sure if the last two should be in that order or not but ya i'm sure someone will tell me :P

Anyways basically I want to know if there is any way that that combo will work (currently ignoring tank size). The only fish I would willing remove from that list is the Trigger, the other ones would kinda burst my bubble lol. Anyways if one fish wont work or two then could someone tell me something i could put in its place that is similar...

Also with these fish I realize they all need a lot of swimming space and what not so instead of going the suggested 1 pound of LR per gallon should i go with something much less? Lets say 50lbs for a 150 gallon tank?

Hi Eclipse. Looking at the list, the eel caught my eye... check this out.

http://www.grizzlyrun.com/Pets/Fish/Saltwa...eel/Default.htm

I don't have any experience with the species you listed however in my opinion the Puffer, Trigger, Eel, and Angel should do fine together. Aggressive tanks are not really my area so you may want to ask over on ReefCentral regarding the compatibility.

With those specific species you will not be able to keep a cleanup crew accept for worms, pods, tiny stars, etc. So therefore a quality protein skimmer, plenty of live rock, and possibly a sump/refugium should be included. Queen Angelfish get large(18"+), are very aggressive especially when older, and should be housed in a larger tank. Even a smaller species of shark will need a very large tank. A bamboo, or Epaulette Shark would need a minimum tank size of 240 gallons.

For someones first marine tank I would personally suggest setting up a FOWLR tank stocked with various peaceful fish. It will be much easier to maintain as they wouldn't produce as much waste and are not messy eaters like Eels, Sharks, etc. are.

i'm just curious but would aggressive/ semi-aggressive fish pick on urchins?

I Googled "sea urchin predator" and several articles were listed. One states:

"Predators of Sea Urchins include octopus and triggerfish, which bite off the spines enabling the fish to crack open the body of the urchin".
http://www.reefed.edu.au/explorer/animals/...ea_urchins.html

Another..."Predators include ..., starfishes, crabs, wolf eels, lobsters, and fishes".
http://seaurchin.org/Sea-Grant-Urchins.html

This pretty much sums it up... "Everything is eaten by something, either larger or smaller (parasites) than themselves, sea urchins are no exception".
http://www.stanford.edu/group/Urchin/nathistory.html

Here are the Google results for the articles that you might want to browse:
http://www.google.com/search?sourceid=navc...r+of+sea+urchin