Donate Take Action

Join us


Marine Animal Encyclopedia

Sand weed Rhodothamniella floridula

This seaweed consists of tiny horizontal filaments made of strings of cells, from which arise other filaments that reach a maximum height of 1 in (3 cm). The upright filaments have irregular side-branches, some of which interweave to form a complex network that traps sand grains. This network builds up to form a spongy mat about in (1 cm) thick. The mat sometimes covers large areas of rocks that are next to sand and creates a habitat for small animals such as nematodes.

Sand weed habitat mapzoom image
  • Kingdom Phaeophyta
  • Height Up to 1 in (3 cm)
  • Habitat Lower shore and subtidal rocks
  • Water_temperature 40–64°F (4–18°C)
  • Distribution Coasts of northeastern Europe and southern Africa