There is no way you can ever go on vacation unless you have trained a tanksitter to come in daily and care for this creature on the same level you do.Their lifespan is one to two years, and especially note that they are NOCTURNAL, which means you will not see them except when tank lights are out or when hungry. They are also extremely escape prone, and can slip out any hole their beak can fit through.This is from a dealer:
" The Pygmy Octopus can be fed shrimp and mussel meat. It will also eat live crayfish and feeder shrimp. Any live foods should be fed spirulina based dry foods, plankton, and krill to enhance their nutritional value.
Suitable tankmates include corals, sponges, featherduster worms and some echinoderms.
Although not particularly light sensitive, all octopi demand perfect water conditions and will not tollerate any form of pollution.
The aquarium must contain a number of suitable caves as hiding places along with a tight fitting lid, as octopi are notorious explorers, squeezing their boneless through the smallest of openings.
When at rest and relaxed, most octopi are fairly smooth skinned and their colour matches their backround. When angered or frightened, they rapidly become much darker or lighter and their skin folds into eruptions resembling algal growth."
I would say they are, along with most cephalopods, not a good first marine specimen to keep.