It's absolutely living, makes the tank so much more interesting when it's out and abouthe looks like he is doing great =)
I don't recall mine ever burrowing. I don't believe this species burrows.
hikari has jumbo bloodwormsIf you can buy some tiny earth worms I would try some of those as it will make it put on a growth spurt once you can get a bit more in to it. They seem to struggle with bigger foods the first time but then get stuck in. I also think you can buy super blood worm which is much bigger.
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hikari has jumbo bloodworms