Invertebrates

Ridged swimming crab (Charybdis natator) is also known as the wrinkled swimming crab or rock crab

Ridged Swimming Crab – Facts and Photographs

The Ridged swimming crab (Charybdis natator) is also known as the wrinkled swimming crab or rock crab. Because of the ridges on their back they are relatively easy to identify. There are two subspecies, the...
The Convex crab (Carpilius convexus)

Convex Reef Crab- Facts and Photographs

The Convex reef crab (Carpilius convexus) is also known as the Round-back Coral Crab. They are fairly common at night in the waters off Dar es Salaam but are seldom seen out during the day. Large specimens ...
Cuttlefish using its arms as lures

Cuttlefish using its arms as lures

While on a shore dive across a sandy area on Mafia Island  diving with David from Mafia Island Diving, I spotted some movement on the sea floor on the edge of the visibility.  The visibility was low, around...
Emperor shrimp (Periclimenes imperator)

Emperor Shrimp-Facts and Photographs

The Emperor shrimp (Periclimenes imperator) is one of the more vividly colored shrimp around.  They form what are termed commensal relationships with various species of nudibranch and sea cucumbers (holothu...
Hairy Coral Crab (Cymo andreossyi) is also known as the Furry Coral Crab

Hairy Coral Crab- Facts and Photographs

The Hairy Coral Crab (Cymo andreossyi) is also known as the Furry Coral Crab . Being small and well camouflaged they are difficult to spot and are probably best found at night when their eyes reflect light ...
Bobtail squid also known as Pigmy Squid

Bobtail Squid- Facts and Photographs

Bobtail squid are also known as Dumpling Squid. They are exceptionally cute looking little cephalopods and are fascinating to watch.  They are in the order Sepiolida and are closely related to cuttlefish al...
Olive Purse Crab, Leucosia pubescens

Olive Purse Crab- Facts and Photographs

The Olive Purse Crab, Leucosia pubescens does not seem to be common in Tanzanian waters and indeed does not seem to be recorded here. Hopefully the identification is correct. They are decapod crustaceans...
Sundial shell (Architectonica perspectiva)

Sundial Shell-Facts and Photographs

The Sundial shell (Architectonica perspectiva) is  also known as the Perspective Sundial shell and the Clear Sundial shell.  They are marine snails in the super family Architectonicoidea and were first desc...
Bubble Tip Anemone (entacmaea quadricolor)

Bubble-tip Anemone – Facts and Photographs

The Bubble-tip anemone (entacmaea quadricolor) is also known as the BTA in the aquarium trade. They are one of the more attractive looking anemones although their colors can vary from drab to brightly color...
Swimming Anemone (Boloceroides mcmurrichi)

Swimming Anemone – Facts and Photographs

The Swimming Anemone, Boloceroides mcmurrichi is fairly common in the shallows in Tanzanian waters. As can be seen in the images they obtain their name from their ability to swim.  The anemones swimming in ...
Squat Shrimp (Thor amboinensis) is also known as the Sexy Shrimp

The Squat Shrimp-Facts and Photographs

The Squat Shrimp (Thor amboinensis) is also known as the Sexy Shrimp. They are small colorful shrimp that form a comensual relationship with various species of anemone. They have a habit of holding their ab...
Unicorn Shrimp in the genus Plesionika

Unicorn Shrimp- Facts and Photographs

The Unicorn Shrimp (Genus Plesionika) are also known as the Narwhal Shrimp.  They obtain their name from the proportionally very long rostrum spine  extending out quite far from the carapace. The rostrum ha...
Sand Mason Worm ( In the Genus Lanice)

Sand Mason Worms-Facts and Photographs

Sand Mason Worms ( In the Genus Lanice)  are not common inhabitants on the reefs in Tanzania, but if one keeps ones eyes open when diving, one can often pick them out in soft sand between corals and rocks. They...
Flathead Slipper Lobster (Thenus Orientalis)

Flathead Slipper Lobster- Facts and Photographs

The Flathead Slipper Lobster (Thenus Orientalis)  is a very unusual looking clawless lobster even by slipper lobster standards.  In Australia they are known as the Morton Bay bug. They are  only active at n...

Partridge Tun Shell-Facts and Photographs

The Partridge Tun shell (Tonna perdix) is a large fairly reclusive mollusk rarely encountered on shallow night dives in Tanzanian waters. They are marine snails in the super family Tonnoidea. They are unusu...