Decorator crab and sponge relationship

Symbiotic Relationship Between Crabs & Sponges by Keith Matthews on Prezi

decorator crab and sponge relationship

Aquarium observations confirm that crabs actively cut sponges and place fragments on .. While no relationship was detectable between carapace size and number of . It is known that, in general, decorator crabs use for camouflage species. Some species of decorator crabs attach sponge fragments on their carapace and so these varieties are called “sponge decorator crabs”. A most striking balance is struck between the decorator crab and the sponges it, well, decorates itself with. The decorator crab does so as a.


While decorator crabs move on top of a sponge colony, they camouflage perfectly and are totally concealed from predators. Front view where eyes and antennae can be seen Another important species of sponge decorator crab is Hyastenus elatus.

This variety shows worldwide distribution but its diversity is more in the Indo-Pacific region.

decorator crab and sponge relationship

For Composcia sp, the pincers or the claw is the only place devoid of any sponge attached! The presence of decorator crabs is often unnoticed during the day time because they prefer to hide in crevices or holes in coral reefs.

decorator crab and sponge relationship

However, the species is very active during the night and towards dawn and dusk when illumination is less. Decorator crabs are carnivorous, feeding on a wide diversity of organic matter and marine fauna.

They hunt down their invertebrate prey during the night time.

decorator crab and sponge relationship

The attachments found on decorator crabs play a dual role. It aids in easy concealment and at the same time, due to the distasteful nature of sponges this is because of the presence of some metabolitespredators dislike coming near the sponge decorator crab.

A Little Help from a Friend: 5 Symbiotic Marine Animal Relationships - Deepblu MAG

Presence of hydroids in the body of some decorator crabs gives a sting to the predator. Through the process of evolution some underwater inhabitants have figured out that they can increase their chances of survival in a hazardous fish-eat-fish world if they collaborate with others.

Symbiosis is a scientific concept that describes a close, long-term interaction between two different species where some form of benefit is gained by at least one of the partners. Symbiotic relationships occur in both marine and land animals.

  • A Little Help from a Friend: 5 Symbiotic Marine Animal Relationships
  • 5 Symbiotic marine relationships

There are three main types of such relationships: Mutualism—describes a relationship between both partners benefit from the interaction. Commensalism—a relationship in which one partner benefits while the other is unaffected. Parasitism—a negative relationship where one partner benefits at the expense of the other.

decorator crab and sponge relationship

Countless symbiotic relationships exist within marine ecosystems. Here is a list of some of those most commonly witnessed by scuba divers.

This is a friendship for the ages.

The decorator crab and Sea Sponge- Commensalism

NOAA Clownfish and Anemones The relationship between clownfish and sea anemone is a perfect example of mutualism, where both organisms benefit from teaming up together. Clownfish make their homes among the poisonous tendrils of the sea anemone, where they are provided shelter, protection and a place to hide from potential predators. In return, the anemone benefits by consuming the waste of the clownfish and the scraps of food that naturally fall by the wayside as the clownfish eats.

Anemone also remain vibrant from the constant aeration generated by the movement of the clownfish.

Decorator Crab ; An Aquarium Fashionista

Barnacles on a gray whale in Hare Eye Lagoon, Mexico. Ken-Ichi Ueda Barnacles and Whales Barnacles have worked out a good deal with whales, mainly humpbacks, reaping great rewards from attaching themselves to the belly or backs of the whales. Barnacles are filter-feeders, relying on plankton that they filter through feather-like appendages that extend through holes in their shells.