Tell your GP if you think it might be trimethylaminuria. It's an uncommon condition and they may not have heard of it. Pufferfish are poisonous as the powerful neurotoxin tetrodotocin (which has no known antidote) is found in the internal organs and skin. The sale of pufferfish for human consumption is banned in the EU and United States. However, in Japan pufferfish, where it is known as fugu, is considered to be a delicacy with chefs – who must have had at least two year’s training and have passed written and practical exams – able to fillet the fish to avoid the poisonous organs and serve the edible flesh. Sunfish The Humphead Wrasse, also known as the Napoleon Wrasse, is a large, colorful fish that can be found in the tropical waters of the Indo-Pacific region.

Sea cucumbers play an essential role in the marine ecosystem by breaking down organic matter and recycling nutrients. They feed on detritus and plankton, using tentacle-like structures around their mouth to capture food. Discover More with Active WildPiranhas are freshwater fish found in rivers and lakes in South America. The red-bellied piranha is one of the largest species of piranha, with exceptionally large individuals reaching lengths of 50 cm (20 in). The species can grow up to 50 cm in length and is typically found in shallow coral reefs and seagrass beds. Like other squid, the Humboldt squid has the ability to rapidly change its color, which it uses for communication and camouflage.

Flying fish are a group of about 50 species of fish that are found in tropical and subtropical waters around the world. They are named for their ability to leap out of the water and “fly” through the air, which they do to escape predators. Jawfish are a family of small, bottom-dwelling fish that are found in shallow waters in tropical and subtropical regions around the world. They are named for their prominent jaws, which they use to excavate burrows in the sand or rubble on the ocean floor. This elusive deep ocean fish lives at depths of over 13,000 feet / 3,962.4 meters and has a long, eel-like body with a gelatinous texture. Very little is known about the faceless cusk’s biology, including its reproductive habits and diet. Discover More with Active WildThe Coelacanth can grow up to 2 meters in length and weigh up to 90 kilograms. It is found in deep waters around the Comoro Islands off the coast of East Africa, and is a slow-growing, long-lived species. The species is considered Critically Endangered by the IUCN due to overfishing, bycatch in deep-sea trawling, and habitat destruction. Discover More With Active Wild Nautiluses are marine cephalopods related to squids and octopuses. They have a spiral shell, divided into chambers, which they use to regulate their buoyancy by controlling the amount of gas and fluid within each chamber.