Periphytons are also called:

Correct option is B

Correct Answer: (b) Haptobenthos
Explanation:
→ Periphyton are communities of algae, microbes and detritus attached to submerged surfaces (plants, stones) — hence called haptobenthos (hapo/haps = attached).
→ They form biofilms important as primary food for many grazers.
Information Booster:
→ Periphyton abundance is a good indicator of nutrient status and primary productivity in shallow waters.
Additional Information (Other Options):
(a) Rhizobenthos: organisms attached to roots.
(c) Endobenthos: live within sediments.
(d) Herpobenthos: creeping/surface dwellers.