A preliminary gut content analysis was carried out to investigate the shrimps' diet. None of the six dissected guts contained traces of poriferean spicules. The spicules are presumably too big (0.2-0.3mm) to be consumed by the shrimps. On the other hand, a variety of different diatoms, which possibly accumulate on or within the sponge, were found in the guts. These findings suggest that the shrimps do not feed on sponge's tissue and thus do not parasitise their hosts. Instead, they appear to be commensals using the sponge's cavitities as shelter and the inherent accumulation of diatoms as a food supply.
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