Abstract: An artificial marine habitat made of seaweed affixed near-off bottom on buoyant ropes (10) and shellfish affixed near-off bottom on racks (26) whereby the symbiosis of seaweed and shellfish produces a synergic effect resulting in increased diversification and production of marine species inhabiting this habitat. If ropes (10) are colonized by unwanted shellfish they fall on the water bottom where these shellfish are eliminated by bottom predators. If racks (26) are colonized by unwanted seaweed, this seaweed is eliminated through the shellfish competition incited by the aquaculturist which on these racks installs already-mussel-colonized ropes (10). The man-made marine habitat gives new shelter, food, and reproductive ground to marine wildlife and is a prime place for aquacultural and recreational activities.

Abstract: A combination of old and new features to cultivate seaweed on the sea bottom comprising the steps of cultivating in a laboratory sporophytes and fixing them on lines, setting anchors on various water bottoms, installing near off-bottom artificial substrates, and transferring the pre-cultivated sporophytes onto these substrates. The complete method allows young seaweed and young kelp to survive the exaction of bottom and off-bottom grazing predators and inter-species competition.

Abstract: A fence-like habitat for sheltering and feeding fish, and practicing aquaculture. The fence serves as a shield for small and juvenile fish which seek protection from predators and water movement. The habitat offers substrates for use in the aquaculture of seaweed and shellfish. A complementary bottom habitat is formed by the detachment and drop of seaweed and shellfish to the bottom of the water.

Abstract: Artificial substrates for use in open sea enhancing biomass and/or absorbing wave energy, improved by means of particular dispositions and devices concerning their number, mooring, flotation, and using buried anchors and inertia weights. The artificial substrates are associated with affixed sessile organisms such as algae and shellfish and implanted securely even in very rough seas. The fulfill economical requirements for the development of aquacultural farms, aquacultural breakwaters, algae fields and shellfish reefs.

Abstract: Artificial substrates for use in open sea enhancing biomass and/or absorbing wave energy, improved by means of particular dispositions and devices concerning their number, mooring, and flotation.They are associated with affixed sessile algae and shellfish. They can be implanted trustworthily in very rough seas. They fulfill economical requirements for the development of aquacultural farms, aquacultural breakwaters, algae fields and shellfish reefs.