Hello, I was thinking, if ocean colonies don't work, this might.
The plan is to basically to grow, and inhabit a large whale type, and feed off the whale internally. The relationship wouldn't be completely parasitac, as the whale would be given advantages that it normally wouldn't have(like intelligent control of the whale so it avoids harsh regions of the ocean swarming with fishermen). The great thing about living in a whale(once you setup it's advantages) is it would take very little resources to maintain your environment. Whales also live(without medical intervention of any kind) 80-100 years on average. Meaning that by the time you die(if you were starting from birth) the whale would probably be ready to die as well. You'd probably die sooner than the whale do to the fact that you wouldn't have a whole lot of medical intervention.
Whales are mammals and are warm-blooded, and breath oxygen the same way we do.
The advantages I would give the whale from hunting alone, would more than give justification to my existence within the whale(the weapon I was talking about could be used for hunting, and could be attached to a whale, allowing the whale to easily kill it's prey, and eat it).
I could generate power for the whale via oceanic thermal differences between the ocean floor and higher levels, I could shoot down a tube all the way down there, and one nearly all the way up the surface, and use it to generate energy(meanwhile using a specially modified stirling engine(to heavily increase power output)) to produce huge quantities of power for myself and for my living environment.
Biological computers made of LBS animal neurons could be used for processing information, allowing me to still have access to processing/computers.
For manufacturing I could use layering manufacturing(which is being researched by both Hewlett Packard and a guy in London who has developed a basic replicator(I had the same idea many years ago, but didn't develop it, due to lack of resources, and the fact I figured out a potentially much better way to replicate things, but if that doesn't work, I'll be forced to rely on his tech)), to manufacture many different machines that I would need to use, to maintain my colony inside the whale.
Inside the whale I could grow lots of plankton to produce food and oxygen for the whale, as well as generate lots of power for various operations that would be needed, and many other functions(as well as the growth of certain organisms that would make the whale and I healthier), and I could use electromagnetic regeneration to enhance and regenerate the whale against the many damaging factors that the whale would/will suffer in this world(such as the use of sonar which blast out whales ear drums, or perhaps the immense amount of toxic metals which pollute and poison whales and whales livers and kidneys).
I could also construct ocean farms for plankton production for the whale.
The relationship would be symbiotic.
Lets see- Benefits to the whale
Manfuacturing,
Regeneration
Control/Guidance/Intelligence
Defense/hunting/offense
Energy production/food production
Oxygen Production
Life Extension
Protection
Benefits to me-
Food
Shelter/Habitat
Freedom
Protection
Environment
Use of the ability to construct various objects for whatever the whale needs(so long as the resources exist).






