We've been happily busy since our grand opening and our animals (not to
mention our workers) are comfortably settling into their temporary homes. Our
juvenile Wolf eel (Anarrhichthys
ocellatus) curiously ventures out of her barnacle den during the late afternoon
in search of food, the Decorator crabs (Naxia
tumida) happily place sea lettuce and fucus onto their backs in attempts to
camouflage themselves against possible predators and
our lovely giant Pacific octopus (Enteroctopus
dofleini) Barbara puts on quite a show chasing red rock crabs around the
tank in preparation for a delicious meal.
Juvenile wolf eel explores her barnacle surroundings |
Barbara, the giant Pacific octopus |
Things are becoming so comfortable,
in fact, that we are already noticing several new non-human additions to our
aquarium; not only can you often find crabs clutching onto one another in a
pre-mating holdfast (leading several visitors to ask the question, ‘what exactly are they doing?!), but looking
through the glass in our tidepool tank reveals several Perch (kelp, shiner, and
striped) that are looking a little larger in the middle than normal. Are these
gals pigging out on krill? Doubtful. They're pregnant!
A school of shiner perch swimming by |
Within a few weeks the expecting females will look about ready to explode with their little babies. In preparation for the mass birthing, we're planning to relocate our mothers from any potential baby eaters, such as black rockfish, predators capable of turning the miracle of life into a smorgasbord! Of course, such is the way of life in the ocean and we can't protect all our newborns from the wonders of natural selection. The babies, 1 ¼” miniature version of their parents, are born so well developed that they practically swim out of their mothers. The males are also born reproductively mature with females maturing only a few weeks later. Cool, hey!
Just recently we’ve also found some Opalescent squid (Loligo opalescens) eggs which look about ready to hatch. The mating ritual of these fast swimming cephalods is not quite as romantic as that of the perch; instead, the male will aggressively grab the female and deposit his sperm packet (using his hectocotylized third right arm) inside the mantle of the female. The female then lays dozens of large egg capsules shaped like gelatinous cigars, each containing 180-300 eggs! The eggs develop directly and, after about three to five weeks, hatch, but the adults die shortly after spawning. These little squidlets aren’t left entirely unprotected though; the egg capsules have no taste or odor, so they are not perceived by food as predators! We’re looking forward to having a tank full of swimming squids soon.
A cluster of squid eggs |
Squid embryo |
Spawning is almost a weekly event in the aquarium with various species
releasing mass amounts of sperm and eggs into the surrounding water. Come visit
the aquarium for answers about where babies come from and to check out the
progress on our animals!