Flaxbeard's Steam Power (FSP) is a tech mod based on steam power at its core. Its goal is to add innovative content that encourages fun play rather than trying to one-up other tech mods.
Mariculture's main focus is the Aquatic Environment. It adds terrain generation to the oceans, with things like coral and kelp, to improve the visuals of the underwater world. The mod also expands upon the vanilla fishing system, adding various types of rods and loot you can catch with them, while requiring you to use bait in order to operate these new fishing rods. As well as this, Mariculture introduces fish breeding, which can be a handy way to get your hand on various resources, slowly but surely. There is also jewelry that you can enchant made from pearls, as well as various new objects, that will help with exploring under and above water. Mariculture also adds various machines, that use or create Redstone Flux, with a focus on water related things to power them, or function.