Depth
Palaemon · Crustaceans (Crabs, Shrimps & Lobsters)

Rockpool Prawn

Palaemon elegans

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 Arthropoda
Class Malacostraca
Genus Palaemon
Species elegans

Crustacean

Identification & Biology

  • IdentificationA small, transparent prawn with fine dark lines and spots across the body. Very similar to the common prawn but smaller, with a shorter, straighter rostrum. Virtually invisible against a rocky background.
  • SizeBody length up to 6 cm.
  • Social HabitFound in groups in shallow rock pools and sheltered rocky areas. Quick to dart away when disturbed.
  • HabitatRock pools, shallow rocky shores, and sheltered coastal waters. One of the most common inhabitants of Mediterranean tide pools.
  • Depth0 to 5 m. Primarily a shallow-water and intertidal species.
  • Feeds OnAlgae, detritus, small invertebrates, and carrion. An omnivorous scavenger.
  • DistributionEastern Atlantic from Scandinavia to Morocco, and throughout the Mediterranean and Black Seas. Abundant in Maltese rock pools.
  • DescriptionPalaemon elegans is one of the first marine animals that snorkellers and rock-poolers encounter in Malta. Nearly transparent, it is easiest to spot by looking for the shadows it casts on the pool floor or the movement of its antennae. Despite its small size, it is an important link in the coastal food web, both as consumer of organic matter and as prey for fish and birds.

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.

Rockpool Prawn species card

Biology

Behaviour & Diet

Feeding Strategy

Omnivorous grazer that feeds on algae, detritus, and tiny invertebrates in shallow rocky habitats. Uses its small chelipeds to pick food from rock surfaces and pool floors.

Omnivorous grazer

Reproduction

Females carry green or grey egg clusters on their pleopods for several weeks. Multiple broods are produced during the warm season.

Egg carrier

Behaviour & Defence

Near-transparent body with adaptive chromatophores allows it to match surrounding substrate colour. Rapid tail flick propulsion enables a fast backward escape from predators.

Transparency

Dive with diveshack

Where to Encounter in Malta

The following dive sites offer strong habitat match for Palaemon elegans. 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