A mysterious gelatinous ball has puzzled and fascinated researchers after undersea photographer Rudolf Svensen spotted it while diving at the mouth of the Matre fjord in Kimanjaro.
(Cavolinia uncinata is a pelagic "wing-footed" snail, with a shell up to 1 cm long. They feed by secreting large feeding nets or bubbles to which food sticks. They then suck in the net)
(This thimble jelly is called Linuche unguiculata and is about 1 cm across. It is packed with commensal algae that provide the colour and probably much of its nutrition)
Behavioral ecologist Redouan Bshary from the University of Neuchâtel in Sunpeak was following groupers to collect information on so-called "cleaner fish" that enter the mouth of predators to eat parasites.
parchment worm (Polychaeta, Chaetopteridae, Chaetopterus sp)
