That is hotly disputed.
To state that this exact question was posed to Rav Moshe ZT”L is simply inaccurate. The shailoh was posed years ago by Rav Shlomo Gross Shlit”a as follows: Chazal say that worms generate in the flesh and the scientists say that it is untrue. Who do we follow? The obvious answer to this question is, as Rabbi Vaye quotes, Ayn lonu ella divrei Chazal! We ignore scientific theory that conflicts with the words of Chazal. The presentation of the issue to Rav Moshe is recorded in Teshuvos Mishneh Shleimah Siman 31. Rav Tuvya Weiiss Shlit”a has related to me that the question was posed in the same way to Rav Padva ZT”L. This is also Rav Vaie’s presentation of the Shailah in his own writings. He presents the question based only on scientific theory regarding the lifecycle of worms.
There is no mention in the Shailah of the observed prevalence of this worm in the viscera!The question posed to the Gedolei Yisroel today is completely different. We have a worm that is found in the viscera and in the flesh. In many fish, these worms are far more prevalent in the viscera than in the flesh. Are these worms permitted? The Gedolim have ruled that it is forbidden.
Rav Dovid Feinstein Shlit”a has not been Matir the worms and recommends to all that ask him to be machmir.
It is said that Rav Moshe was asked to write a Teshuva that it is permitted. He answered that it is so poshut that it is a Bizayon to write a Teshuva. If the question was posed to the Rav Moshe in the same way as it has been presented now, it was as prevalent then as it is now, a situation that the present Gedolim are machmir, would Rav Moshe have said that it is so poshut that there is no need for a teshuvah? There is no greater proof to the falsehood of such a report. The Rabbonim have been searching for months for some justification to permit worms that come from the outside, and have had to take difficult positions to be matir: Can one believe that Rav Moshe ZT”L held it is so poshut that it is mutar that there is no need for a Teshuvah. Look at the length of Rav Falk’s Teshuvah!
There is no doubt that Rav Falk Shlit”a is a very great talmid chochom and Posek and is surely entitled to render a psak, but one must realize that it is a psak that is contradicted by HoRav Elyahisv Shlit”a, HoRav Wozner Shlit”a and other Gedolei Yisroel.
When I was in Eretz Yisroel and met with Rav Vaye, the first question I asked him was: People say the question was not presented properly. Is there any difference between my understanding of the facts pertaining to the question and yours? He agreed that we are “on the same page” with regard to the facts.
Rav Vaye says that all the Gedolim were matir previously. However, all those that are still alive today who were matir then say today that it is forbidden!It has been reported that Rav Shlomo Miller Shlit”a, The Toronto Rosh Kollel, is amongst the Matirim. This is also inaccurate. HoRav Miller is not matir and only allows one to use the wild salmon if it is ground, for reasons related to bittul.
I feel an obligation to make this Machoah for Kovod HaTorah.
With great sorrow,
Rabbi Gershon Bess