Palolo Worms facts and info. Know Palolo Worms weight-reduction plan, habitat, behaviour taxonomy, and so on See attention-grabbing facts of Palolo Worms in our animal facts archive.
Scientiﬁc identify: Eunice species
What do they seem like? These worms show the segmentation that’s frequent to all of the annelids (polychaetes, earthworms, and leeches). When totally grown, they are often roughly 1 m in size. The head finish bears sensory tentacles and advanced jaws.
Where do they dwell? Palolo worms are discovered world wide in tropical and subtropical seas. They usually dwell beneath the low-water mark in coral and rocky crevices, though some species construct burrows within the mud or sand of the seabed.
For a lot of the 12 months, the Palolo worm, protected in its rocky or coral crevice, seems to be like every other sedentary polychaete, its physique divided into a protracted sequence of equivalent segments. The worm on this stage of its life is named the atoke, which is a####ual and can not breed. However, with the altering seasons, the time is correct for breeding, and quickly the worm’s look undergoes a radical transformation. From the rear of the worm, new, extremely modiﬁ ed segments begin to develop, till a protracted chain of these equivalent items hangs from the rear of the atoke. This new and fully completely different part of the worm is named the epitoke, and it’s this half that’s concerned within the strategy of replica.
The segments of the epitoke are precise replicas of each other, and every is filled with eggs and sperm. On the floor of the epitoke section there’s a single eyespot; nevertheless, this isn’t an organ for discriminating shapes and element, however quite for telling evening from day.
Huge numbers of these worms, with their epitokes totally fashioned, wait of their refuges for a speciﬁ c cue to spawn. The cue is the moon, and in October or November, firstly of the final lunar quarter, all of the worms release their epitokes on the identical time.
The epitokes, freed from the atoke, swim with undulations of their spaghetti-like kind to the floor of the ocean, and because the solar rises (detected by the eyespot), they burst, releasing their eggs and sperm. The sea, shut to shore, shall be a soup of gametes. The eggs are fertilized quickly, and by the subsequent day, tiny larvae have fashioned.
After drifting for 2 or three days, these offspring start to settle and ﬁ nd rocky hideaways of their very own the place they’ll become grownup worms in preparation for the subsequent 12 months’s mass spawning. The atoke, nonetheless in its burrow, will regenerate a brand new epitoke for the next 12 months’s breeding season.