Fiskelly - new danger for the Soulsand Valley

Fiskelly spawns in packs of 3 to 6 exclusively in the Soulsand Valley, and has the appearance of a white skeleton fish with blue pupils. Fiskellies can "swim" in Soul Sand and Soul Soil, but they can immerge only half of their body in these blocks. However, they can swim and fully immerge themselves in both water and lava, but lava can kill them (unless if they have the Fire Resistance potion effect). Fiskellies are hostile and they can attack you while they're on Soul Sand/Soil, but sometimes they can also jump 3 blocks high out of the soul blocks and attack you. When they're in water or lava, they attack like a normal hostile fish would. As I said before, Fiskellies can spawn in packs of 3 to 6, but there's more! Fiskellies never leave each other, and they can also "invite" other Fiskellies to join the pack, but they have a set limit on how many Fiskellies can be in one pack, which is around 10 Fiskellies. Fiskelly has 8 HP and deals 3 damage in hard. Upon death, it drops 0-2 bones and 0-1 Soul Sand.