View allAll Photos Tagged FCDB
I built this for the Lego Ideas Moments in Space contest. The winning entry has the chance to be made into an official Lego set that would be available as a gift with purchase. If you like it, please vote for it. If you really like it, please comment on the Ideas page and share the link to help this mini rover get more votes. ideas.lego.com/challenges/1b817aba-3990-4e6d-a17f-7a59a94...
Thank you and sorry for the self promotion.
(one of five photos)
I built this for the Lego Ideas Moments in Space contest. The winning entry has the chance to be made into an official Lego set that would be available as a gift with purchase. If you like it, please vote for it. If you really like it, please comment on the Ideas page and share the link to help this mini rover get more votes. ideas.lego.com/challenges/1b817aba-3990-4e6d-a17f-7a59a94...
Thank you and sorry for the self promotion.
(one of five photos)
It seems it's not only an affliction of men that reach a certain age. Even marine life suffers from bald patches from time to time.
Taken at Stingray City (the dive location, not the Cruise Ship location) off Grand Cayman during a dive. Shows the mouth of the ray very well.
The worm is aptly named; Both its common and Latin names refer to the two, chromatically-hued spiral structures that are most commonly what is seen of the worm by divers. In actuality, these multicolored spirals are merely the worm's highly-derived respiratory structures.
S. giganteus appears like most tube-building polychaetes. It has a tubular, segmented body lined with chaeta, small appendages that aids the worm with its mobility. As it does not move outside its tube, this worm does not have any specialized appendages for movement or swimming.
The worms's most distinct features are the two "crowns" that are shaped like Christmas-trees. These "crowns" are actually highly modified prostomial palps which are specialized mouth appendages of the worm. Each spiral is actually composed of feather-like tentacles called radioles, which are heavily ciliated which allows any prey that are trapped in them to be transported straight towards the worm's mouth. While they are primarily feeding structures, S. giganteus also uses its radioles for respiration. It is because of this that the structures are commonly called "gills".
One of the major differences between Christmas-tree worms and the closely-related sabellid fan worms is that the latter do not have any specialized body structures to plug the holes of their tubes with when they withdraw into them. S. giganteus, like the other members of its family possess a modified radiole, usually called the operculum, that it uses to secure its hole when withdrawn into its tube.
As an annelid, S. giganteus possesses a complete digestive system. It has a well-developed closed circulatory system. Like other annelids, these worms possess well-developed nervous systems with a central brain and many supporting ganglia, including pedal ganglia, which are unique to the Polychaeta. Like other polychaetes, S. giganteus excrete with fully-developed nephridia. When they reproduce, they simply shed their gametes straight into the water where the eggs (and spermatozoa) will become part of the zooplankton and can be carried by the currents.