The National Aquarium in Baltimore has announced the following increases in ticket prices to take effect Saturday:

..... ..... .....New..... ..... ..... Old

Adults.. ..... .....$11.50.. ..... ..... $10.75

Students, seniors,

military ..... ...... 8.75.. ..... ....... 8.50

Children 3-11.. ..... 6.75.. ..... ....... 6.50

Children under 3 .... free.. ..... ....... free

There are several discount days. Admission is $1 on Aug. 8, the anniversary of the aquarium opening. Tickets are $3.50 every Friday after 5 p.m. between Oct. 1 and March 31, 1992.