Body of Hydra oligactis radially symmetry.They are ecothermic. Aboral end of the body is flattened and oral end having circular mouth. Base of hypostome having six tentacles. There are small lumps on the tentacles which show nematocysts.
Habitat & Distribution in Bangladesh:
Freshwater bodies including lake and river
Environment:
Freshwater
References:
Kabir SMH, Ahmed M, Ahmed ATA, Rahman AKA, Haque EU, Ahmed ZU, Begum ZNT, Hassan MA, Khondker M (eds) (2008) Encyclopedia of flora and fauna of Bangladesh. Protozoa-Gastrotricha. Asiatic Society of Bangladesh, Dhaka. Vol.14, 335 pp.