No, In fact it is a Tuba.
Tuba
The euphonium is the second lowest member of the brass family.
There are many brass instruments smaller than a tuba, because the tuba is the largest of the brass instruments. The instruments smaller than it in order from largest to smallest are: Baritone Horn, Euphonium, Trombone, Trumpet, Cornet, Piccolo Trumpet.
The bass bassoon
Timpani is the lowest i can think of. :)
Tuba
The lowest pitch, and therefore largest, is the tuba.
The euphonium is the second lowest member of the brass family.
bass clarinet
I believe that the trumpet is the highest in te Brass famly, and the tuba is the lowest. In general, the bigger instrument is the lowest.
There are many brass instruments smaller than a tuba, because the tuba is the largest of the brass instruments. The instruments smaller than it in order from largest to smallest are: Baritone Horn, Euphonium, Trombone, Trumpet, Cornet, Piccolo Trumpet.
The bass bassoon
Timpani is the lowest i can think of. :)
The tuba. This large brass member is pitched incredibly low, and is the lowest pitched brass instrument.
The smallest and highest pitched member of the string family in modern times is the violin. The Eucolale and mandolin are also pretty small but in terms of pitch it has to be the violin. In the old days they was an instrument called a rebec which was like a violin but smaller. The rebec was very popular with soldiers as could easily be carried in their packs.
Short answer: Yes. Long answer: Yes. Longer answer: Many people who start on the trumpet end up changing instruments (sometimes french horn, baritone, trombone, or tuba). However, the most popular instrument is still the trumpet.
A tuba is a low pitched instrument. It uses the bass clef also.