Question

Antedon feeds on
A) Small animals
B) Planktons
C) Detritus
D) Both B and C

Answer 1

Hint:The grooves carry the finger-like non-prehensile tube-feet or podium all across the course. The ambulacral grooves in Antedon are definitely the grooves of food.

Complete answer:
First we should know about Antedon to answer this question. The Antedon is a species of stemless, free-swimming crinoids. In the Cretaceous period, the genus first existed in the fossil record. There are no stems in members of this genus but five pairs of wispy arms emerging from a single concave disc. On a low, cone-formed dorsal ossicle, a bone-like form in the middle of the disc, there are a variety of cirri or unbranched appendages.
Now, let us find the solution from the options-
- Antedon does not consume animals that are small. It eats species such as plankton that are microscopic. Thus, option A is not the correct option.
- Plankton and waste are consumed by Antedon (Sea lily). The small plants and creatures drifting in the water are plankton.
- Antedon feed on detritus as well. Detritus is dead organic particulate waste. It contains dead organisms' bodies or fragments and also faecal waste.
 - Antedon eats on detritus as well as plankton.

Thus, the correct option is option (D) Both B and C

Note:Antedon is a shallow-water inhabitant. At the beginning, it is a stalked pattern and with the achievement of adulthood it breaks away from its stalk and actively swims through the arms. They may even hang by the cirri on the substratum. They have gregarious types and they eat on living microscopic organisms.