Pneumatophores occur in

Pneumatophores are respiratory roots which are found in halophytes, such as mangroves. Halophytes grow in saline swamps. In these plants, many roots come out of the ground and grow vertically upwards. Such roots,
called pneumatophores, help to get oxygen for respiration.

(2) Free-floating hydrophytes are aquatic plants that lack anchored roots and instead float freely on the water's surface, obtaining nutrients through specialized structures called "floating leaves" or "air sacs."

(3) Carnivorous plants possess specialized adaptations such as modified leaves or traps that allow them to capture, digest, and absorb nutrients from small animals or insects as a supplementary source of nutrition. Example: Nepenthes

(4) Submerged hydrophytes have adaptations such as thin, flexible leaves with reduced cuticles to facilitate nutrient absorption and efficient gas exchange underwater.