Soft corals are by far the easiest to keep in a marine tank. They are not very fussy (compared to LPS and SPS) and are always the first choice of soft coral for beginners. The name ‘Soft Coral’ is derived from its physical structure.
Unlike both LPS and SPS, soft corals have no skeletal or bone-like structure. They are simply comprised of soft tissue. In fact some soft corals are purely gelatinous with no structure at all out of the water.
You will encounter this when you transfer from a fish bag into your tank, and will need to keep the transfer process under water. Above water these gelatinous corals are similar to a blob of goo.