Depth
Haliclona · Sponges

Pink Tube Sponge

Haliclona mediterranea

0-40m
Depth Range
Variable
Max Size
Mediterranean
Distribution
0-40m
Depth Range
Variable
Max Size
Reef & Open
Habitat
Carnivore
Diet
Solitary
Social
LC
IUCN Status
Kingdom Animalia
Phylum Porifera
Genus Haliclona
Species mediterranea

Sponge

Identification & Biology

  • IdentificationA delicate, tubular sponge that grows in clusters of upright, thin-walled tubes. Pink to pale lavender in colour. Each tube has a single large opening at the top. The walls are thin and translucent.
  • SizeIndividual tubes up to 15 cm tall and 3 cm in diameter. Clusters can contain a dozen or more tubes.
  • Social HabitSessile. Grows in clusters on rocky surfaces, often in sheltered areas. Each tube draws water in through pores in the walls and expels it through the top opening.
  • HabitatRocky reefs, overhangs, and sheltered wall areas.
  • Depth5 to 50 m. Common between 10 and 30 m.
  • Feeds OnBacteria, microalgae, and dissolved organic matter filtered from the water.
  • DistributionMediterranean Sea. Present in Maltese waters.
  • DescriptionHaliclona mediterranea adds a delicate splash of pink to Maltese rocky reefs. Its clusters of upright tubes are easily recognised and are a common sight on walls and overhangs. The thin walls make it fragile and vulnerable to physical damage from careless fin kicks. Like all sponges, it is a highly efficient filter feeder, processing many times its own volume of water each day.

Range

Habitat & Distribution

Found across the Mediterranean, inhabiting reef & open environments. Active from the surface down to 40m depth.

Where Malta divers have spotted this species

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Sightings are logged by divers using our What Did You See? dive-log tool. View the full live sightings map.

Detail

Preferred Environment

Reef & Open habitats, typically at depths of 0-40m. Most commonly encountered by divers at the shallower end of its range.

Encounter Tips

Best approached slowly and calmly. Avoid casting shadows directly over the animal. Neutral buoyancy and patience increase encounter success significantly.

Pink Tube Sponge species card

Biology

Behaviour & Diet

Feeding Strategy

Water is drawn in through tiny pores along the tube walls and expelled upward through the central osculum, filtering bacteria and fine organic particles. The tubular shape creates a chimney effect that enhances water flow efficiency.

Filter feeder

Reproduction

Reproduces sexually during warmer months, with brooded larvae released into the water column. Can also propagate asexually through budding, with new tubes growing from the base of established colonies.

Brooding

Behaviour & Defence

Relies primarily on bioactive metabolites to deter predators, though it is less chemically defended than some Mediterranean sponges. Its preference for cryptic, shaded habitats also reduces exposure to grazing fish.

Chemical defence

Dive with diveshack

Where to Encounter in Malta

The following dive sites offer strong habitat match for Haliclona mediterranea. All are accessible on a guided dive with diveshack.

5-30m
North Malta

Cirkewwa

Rocky reef with caves, arches and ledges hosting a rich diversity of reef species.

View dive site ›
5-50m
Gozo

Blue Hole

One of the Med's most famous reef dive sites. Rocky walls and archways covered in life.

View dive site ›
18-36m
South Malta

Um El Faroud

The wreck lies on a sandy bottom surrounded by rocky reef -- a diverse habitat attracting reef species.

View dive site ›
IUCN Red List Least Concern

Conservation Status

This species is assessed as Least Concern on the IUCN Red List. Mediterranean populations face ongoing pressure from fishing activity, habitat degradation, and climate-driven changes to prey availability.

Source: iNaturalist Guide #888
by Lesley Clements (CC BY-SA)
diveshack Mediterranean Marine Life guide