all benthic sharks (from what i know). they are all susceptible to goiter from a lack of iodine/-ide in its diet. It is essential for thyroid development. Same with humans that live in land locked nations and never get food from the ocean. Iodine is necessary in human thyroid development as well and a lack of it results in goiter in humans. There are some African and Middle Eastern nations where this is a recurring problems. Look up google images for goiter in benthic sharks and humans, its horrendous.
Just my 2 cents. Im sure Zoodiver knows if there are sharks that dont suffer from this malady.
Spot on.
Goiters can be a pain to deal with if not stopped and reversed right away. I suggest the Mazuri (or some type of shark specific) supplement for all sharks, but especially the benthics.