"Marine crabs that are colorful and adorned with distinct markings may be actually poisonous," said Dr. Angel C. Alcala, National Scientist for marine biology and conservation. These are several mildly or highly poisonous coral reef crabs in the country, he said. "Six species can cause acute poisoning." And the crabs are not for eating, because boiling does not rid them of the toxins.

Icamina, P. (2015, July 21). Poison crabs crawl in coral reefs. Malaya Business Insight, p. B2.