The ornamental design for a tentacleball with tailstrands, as shown and described.
FIG. 1 is a front view of a tentacle ball with tail strands in accordance with the present invention;
FIG. 2 is a top view thereof; and,
FIG. 3 is a bottom view thereof.
The visual appearance of the opposing and adjacent sides of FIG. 1 is essentially the same as in the views presented, any differences being due to the degree of irregularity in the positions of the flexible elements that can be seen in the views provided.