philippina

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Stinging Hydroid (Macrorhynchia philippina)

Also known as the Philippine hydroid, the Stinging hydroid is a species of hydrozoan found throughout the warm waters of the South-Pacific. Although it may look like a plant this cnidarian is actually a colony of small zooids that work together to form a functioning animal. Their common name holds up as they can and will sting if approached or handled. 

Phylogeny

Animalia-Cnidaria-Hydrozoa-Hydroidolina-Leptothecatae-Agalopheniidae-Macrorhynchia-philippina

Image Source(s)