Green Spoon Worm – Facts, Habitat, Diet and Information

Green Spoon Worm facts and info. Know Green Spoon Worm food regimen, habitat, behaviour taxonomy, and so on See fascinating facts of Green Spoon Worm in our animal facts archive.

Scientific identify: Bonellia viridis
Scientific classification:
Phylum: Echiura
Order: Echiuroidea
Family: Bonellidae

What does it seem like? The physique of the feminine is round eight cm lengthy, inexperienced or blue/inexperienced, sausage formed, and coated in small lumps. The feminine additionally has a protracted proboscis, which, when absolutely prolonged, may be up to 2 m lengthy. The male however is tiny, just one-2 mm lengthy. 

Where does it dwell? The inexperienced spoon worm is a marine invertebrate, a denizen of the shore in northeastern Atlantic and Mediterranean waters. The females are present in areas the place the floor is difficult, with crevices through which they’ll conceal.


S*x is without doubt one of the greatest conundrums within the animal kingdom, however no matter its true origins and perform, male and feminine animals are sometimes fairly distinct in look and life-style.

Nowhere is that this extra obvious than within the inexperienced spoon worm, a species through which for a few years the male was unknown. It was thought the species had no want of males and might reproduce with out intercourse, however after many fruitless searches, the males had been found—and they had been very completely different from the females.

Female inexperienced spoon worms are about the identical dimension and form as a gherkin, however with the addition of a protracted, skinny proboscis. The males however can solely simply be seen with the bare eye. They are about 1-2 mm lengthy, slipper formed, and coated in a coat of hairlike materials. Most curiously of all, although, is the very fact they dwell inside the feminine. Up to 30 tiny males, many a whole bunch of instances smaller than their mate and bearing no similarity to her in any way, dwell in a particular chamber referred to as the androecium the place they take up the entire food they want from the fluids they’re bathed in.

The males are involved solely with the taxing job of manufacturing sperm, and their our bodies include the organs wanted to produce this prized substance, however valuable little else. The males are in a first-rate place to fertilize the huge companion’s eggs, and additionally they assist out by producing a substance that sticks the eggs collectively.

The eggs are stored inside the feminine’s physique till the larvae hatch, after which they drift within the present close to the seabed. After seven days, they start to settle. Unlike the overwhelming majority of different animals, the gender of a spoon worm will not be decided by its genes, however by its setting—extra specifically, the proximity of a feminine. Should considered one of these younger spoon worms decide on a feminine of the identical species, it would change into a male. It will then develop a sucker and migrate to the feminine’s androecium the place will probably be given free room and board in return for fertilizing eggs. Young spoon worms that settle away from others of their species develop into grownup females over a interval of two years.

Why ought to the intercourse of this little sea creature be decided in such a weird manner? The possibilities of a male finding a mate are slim, which can be the case for the possibilities of a feminine worm finding an empty burrow. The capability to resolve on a gender on the final second provides this species a level of flexibility, enabling the larval worm to make one of the best of the state of affairs through which it finds itself.

Key Facts

  • There are round 140 identified species of spoon worms, though there are in all probability many extra to be identified, particularly within the deep ocean.
  • Spoon worms are marine, though there are a number of Indian species that dwell in brackish water. Typically, they’re inhabitants of the shore, however a number of species have been collected at nice depths. They excavate burrows within the seabed or make use of crevices in rock. They will even inhabit empty shells and the areas between the roots of mangrove bushes. Due to their secretive nature, little or no is thought about spoon worms. Normally, the one seen a part of the animal is the elongated proboscis, which in some species may be prolonged to 100 instances the size of the physique trunk.
  • These animals feed on particles of edible matter by sweeping their lengthy proboscis across the seafloor. The proboscis may be prolonged, however not withdrawn into the physique of the spoon worm. The food particles are trapped in sticky mucus protecting the proboscis, and in a conveyor belt fashion, the mucus is moved by cilia to a furrow that runs the size of this construction. The particles are transported to the mouth of the animal the place they’re ingested. Some species additionally use their proboscis to scoop up detritus, whereas others produce a mucus web from it to lure food.
  • Spoon worms in the best circumstances may be fairly frequent, and consequently, they are often necessary elements of the marine food chain. Although it’s identified that Bonellia viridis does include a neurotoxin in its pores and skin, spoon worms usually are straightforward targets for a variety of marine predators.
  • These animals would not have the segmented our bodies of true worms, however the two teams are intently associated, indicated by the similarity of their larvae. New proof obtained from the examine of DNA signifies spoon worms and true worms could also be rather more intently associated than at the moment believed.
  • Gender dedication in some reptiles and fi sh is comparable to that of the spoon worms.